It may very well seem like I am looking at it in order to fit my interpretation. I know it can happen, but I avoid it as much as possible by trying to view things from all different angles just so those types of beliefs can be avoided.
Jesus the Christ was not just Paul's Lord, nor just the Jew's Lord, He is Lord of all who believe. So when Paul says "our" in verse 3 he is speaking to all in Christ. God does not call just Jews to be holy, He requires it of all believers, so "we" in verse 4 is speaking to all in Christ.
Verse 6 is a key verse not to be lightly looked at. "He hath made us accepted in the beloved". Who is the beloved? Christ of course. But also, the beloved are the natural branches - "Jacob have I loved and Esau have I hated". The beloved are the nation of Israel, so if Paul was speaking of himself and the Jews, then there would be no need for him to say they were accepted - the Jews already are - it is the Gentiles that were 'accepted' by God.
All that Paul says is directed toward the readers, for their edification, not for bragging or to separate Jew and Gentile. Paul tried very hard to continually let Gentiles know that they are apart of the family of God, wild and not by nature, but apart of the family nonetheless. That is why he switches over in the second half, to bring to remembrance how they were at one time separated - but were then brought in.
You're letting your theology drive the interpretation. Since this is the Bible study forum, let's do that. Let's set aside out presuppositions and theology and just look at what Paul wrote. He opens the letter to the Ephesians with,
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: (Eph. 1:1 KJV)
Right here in the very first sentence of the letter Paul acknowledges two different groups. He says to the saints which are Ephesus AND the Faithful in Jesus Christ. That's two different groups.
Then in verses three through twelve he gives a Hebrew praise to God for the things He's done for Israel. In these verses Paul uses first person plural pronouns, us, we, and our. He includes himself in this group. And, he said of this group, 'we who first trust in Christ'. Then in verse 13 he switches to second person plural pronouns, you and your. That he switched to the second person plural pronouns indicates that he is speaking of a different group. There is one group us/we and another group you/your. He hasn't completely identified who these groups are yet but he has given evidence of who they are. He continues to address this you/your group all the way through chapter 2. Then in verse 11 of chapter 2 he identifies exactly who this you/your group is.
11 Wherefore remember, that
ye being in time past Gentiles in the flesh, who are called Uncircumcision by that which is called the Circumcision in the flesh made by hands;
12 That at that time ye were without Christ, being aliens from the commonwealth of Israel, and strangers from the covenants of promise, having no hope, and without God in the world:
(Eph. 2:11-12 KJV)
The you/your group is the Gentiles. It's spelled out plainly. He says that they were without Christ, aliens from the Commonwealth, and strangers from the covenants of promise. What covenants of promise? The ones he spoke of in chapter 1 verses 3-12. He draws a distinction between the Gentiles, uncircumcision, who were without God and Christ and the Jews, circumcision, who had God and Christ.
He continues on to explain how the Gentiles, through Christ, have been brought into the covenants of promise. After explaining how the Gentiles have been included through Christ he draws a conclusion.
19 Now therefore ye are no more strangers and foreigners, but fellowcitizens with the saints, and of the household of God; (Eph. 2:19 KJV)
Ye, the you/your group, are no more strangers and foreigners. Notice the next line here, but are fellow citizens with the saints. The distinction has been between Jew and Gentiles. However, now the Gentiles are fellow citizens with the saints? Who are the saints? They're the Jews. That's the contrast he's drawn. Now, let's look back a chapter 1 verse 1. How did Paul open the letter?
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: (Eph. 1:1 KJV)
The saints are the Jews, they are the, us, we, our, group. The Gentiles are the you, your group. Thus verses 3-12 are about the Jews.
Notice all of this is just straight out of the text. I haven't added any Scripture from anywhere else. This is just what is found in Ephesians 1-2. There is other evidence outside of Ephesians that supports this and there is additional evidence within the book that supports this. I'll address the evidence within the book that supports this in another post. It will show beyond doubt that verse 3-12 cannot be speaking about Gentiles.