This is so misleading and inaccurate that it definitely needs a retort, since it distorts Bible truth. (It is also off topic but cannot be helped.)
At the time that this epistle was written God did not recognize any difference between Jew and Gentile (as numerous epistles will confirm), and here's the proof (Eph 1:1): Paul, an apostle of Jesus Christ by the will of God, to the saints which are at Ephesus, and to the faithful in Christ Jesus:
Does the word "saints" included both Jews and Gentiles? Absolutely.
Does the phrase "faithful in Christ Jesus" include both Jews and Gentiles? Absolutely.
Were there both Jews and Gentiles in Ephesus? Absolutely (Acts 19:17) And this was known to all the Jews and Greeks also dwelling at Ephesus; and fear fell on them all, and the name of the Lord Jesus was magnified.
The epistle to the Ephesians is written to the Church (both at Ephesus and today) (Eph 1:22,24) and the entire first chapter talks about the Church (Jew and Gentile in one Body). And hath put all things under his feet, and gave him to be the head over all things to the church, Which is his body, the fulness of him that filleth all in all
Actually, it's not misleading, it's what Paul said. The grammar is pretty clear. He speaks of us and you. Obviously the "you" is not Paul, he's part of the "us." There are those who first trusted in Christ and there are the "and you after you heard." So he gives us two different methods of distinguishing the two groups. Just because he writes to the Church at Ephesus doesn't mean he is addressing everyone in the church through the letter. In Romans he writes to the church at Rome yet address the Jews in one part.
17 Behold, t
hou art called a Jew, and restest in the law, and makest thy boast of God, (Rom 2:17 KJV)
He continues this dialog with the Jewish believers all the way through chapter 11 where he says,
13 For
I speak to you Gentiles, inasmuch as I am the apostle of the Gentiles, I magnify mine office: (Rom 11:13 KJV)
So, we see that even though the letter was written to the Church, in it he addresses the different groups differently. In Ephesians 1 Paul is addressing the church at Ephesus. However, verses 3-12 are a Hebrew praise. Paul is praising God for what He's done for Israel. It's Israel that was chosen before the foundation of the word to be holy and blameless before Him in love. It's Israel who was predestined to the adoption. It's Israel that had obtained an inheritance.
3 And Moses went up unto God, and the LORD called unto him out of the mountain, saying, Thus shalt thou say to the house of Jacob, and tell the children of Israel;
4 Ye have seen what I did unto the Egyptians, and how I bare you on eagles' wings, and brought you unto myself.
5 Now therefore, if ye will obey my voice indeed, and keep my covenant,
then ye shall be a peculiar treasure unto me above all people: for all the earth is mine:
6 And
ye shall be unto me a kingdom of priests, and an holy nation. These are the words which thou shalt speak unto the children of Israel. (Exo 19:3-6 KJV)
18 And the LORD hath avouched thee this day
to be his peculiar people, as he hath promised thee, and that thou shouldest keep all his commandments;
19 And
to make thee high above all nations which he hath made,
in praise, and in name, and in honour; and
that thou mayest be an holy people unto the LORD thy God, as he hath spoken. (Deu 26:18-19 KJV)
6 For
thou art an holy people unto the LORD thy God: the LORD thy
God hath chosen thee to be a special people unto himself, above all people that are upon the face of the earth. (Deu 7:6 KJV)
Paul said,
I say the truth in Christ, I lie not, my conscience also bearing me witness in the Holy Ghost,
2 That I have great heaviness and continual sorrow in my heart.
3 For I could wish that myself were accursed from Christ for my brethren, my kinsmen according to the flesh:
4
Who are Israelites; to whom pertaineth
the adoption, and
the glory, and
the covenants, and
the giving of the law, and
the service of God, and
the promises;
5
Whose are the fathers, and of whom as concerning the flesh Christ came, who is over all, God blessed for ever. Amen. (Rom 9:1-5 KJV)
Paul said the adoption belongs to Israel, thus his statement in Ephesians 1,
Having predestinated us unto the adoption of children by Jesus Christ to himself, according to the good pleasure of his will, (Eph 1:5 KJV)
The adoption belongs to Israel. He explains in Romans 11 how the Gentiles are grafted into the promises by being grafted into Israel.
13
For I speak to you Gentiles, inasmuch as I am the apostle of the Gentiles, I magnify mine office:
14
If by any means I may provoke to emulation them which are my flesh, and might save some of them.
15 For
if the casting away of them be the reconciling of the world,
what shall the receiving of them be, but life from the dead?
16 For if the firstfruit be holy, the lump is also holy: and if the root be holy, so are the branches.
17 And if some of the branches be broken off,
and thou, being a wild olive tree, wert graffed in among them, and with them partakest of the root and fatness of the olive tree;
18 Boast not against the branches. But if thou boast, thou bearest not the root, but the root thee.
19 Thou wilt say then,
The branches were broken off, that I might be graffed in.
20 Well; because of unbelief they were broken off, and thou standest by faith. Be not highminded, but fear:
21 For if God spared not the natural branches, take heed lest he also spare not thee.
22 Behold therefore the goodness and severity of God: on them which fell, severity; but toward thee, goodness, if thou continue in his goodness: otherwise thou also shalt be cut off.
23 And they also, if they abide not still in unbelief, shall be graffed in: for God is able to graff them in again.
24 For
if thou wert cut out of the olive tree which is wild by nature, and wert graffed contrary to nature into a good olive tree: how much more shall these, which be the natural branches, be graffed into their own olive tree? (Rom 11:13-24 KJV)
Paul addresses the Gentiles telling them that some of the natural branches of the olive tree were broken off and that they being a wild olive tree were grafted into another olive tree. He says that they partake of the root and the fatness of the olive tree. The olive tree is Israel. The Gentiles were grafted into Israel and they partake of the root and the fatness of the olive tree. The promises that the Christian hopes for are the promises belonging to Israel as Paul said in chapter 9, they belong to the fathers.
Paul opens his praise with "blessed be," This is a common in the Hebrew OT.
20 And
blessed be the most high God, which hath delivered thine enemies into thy hand. And he gave him tithes of all. (Gen 14:20 KJV)
10 And Jethro said,
Blessed be the LORD, who hath delivered you out of the hand of the Egyptians, and out of the hand of Pharaoh, who hath delivered the people from under the hand of the Egyptians. (Exo 18:10 KJV)
32 And David said to Abigail,
Blessed be the LORD God of Israel, which sent thee this day to meet me: (1Sa 25:32 KJV)
39 And when David heard that Nabal was dead, he said,
Blessed be the LORD, that hath pleaded the cause of my reproach from the hand of Nabal, and hath kept his servant from evil: (1Sa 25:39 KJV)
Peter too uses this phrase.
3
Blessed be the God and Father of our Lord Jesus Christ, which according to his abundant mercy hath begotten us again unto a lively hope by the resurrection of Jesus Christ from the dead,
4 To an inheritance incorruptible, and undefiled, and that fadeth not away, reserved in heaven for you,
5 Who are kept by the power of God through faith unto salvation ready to be revealed in the last time. (1Pe 1:3-5 KJV)
This is just what Paul did in Ephesians 1:3-12. And, Peter makes it abundantly clear that he is addressing Jews.
Peter, an apostle of Jesus Christ,
To the pilgrims of the Dispersion in Pontus, Galatia, Cappadocia, Asia, and Bithynia,
2 elect according to the foreknowledge of God the Father, in sanctification of the Spirit, for obedience and sprinkling of the blood of Jesus Christ: Grace to you and peace be multiplied.
3
Blessed be the God and Father of our Lord Jesus Christ, who according to His abundant mercy has begotten us again to a living hope through the resurrection of Jesus Christ from the dead,
4 to an inheritance incorruptible and undefiled and that does not fade away, reserved in heaven for you,
5 who are kept by the power of God through faith for salvation ready to be revealed in the last time.
(1Pe 1:1-5 NKJ)
The Dispersion or Diaspora is a reference to the Jews who were scattered through the Babylonian captivity and persecution for being Christians.
We can see Peter here using a Hebrew figure of speech to praise God for what He's done. Paul does the same thing in Ephesians 1. This figure of speech would be quite familiar to the Jews who knew their Old Testament. As I've pointed out it was quite common in the Old Testament.