The point is that God chooses us to salvation conditionally, not unconditionally.. and those conditions are sanctification of the Spirit and belief of the truth.
Do you agree with that or not ? If not, then why not when it says so plainly..?
God chose Israel as His peculiar people...a chosen nation to make known the Power, Mercy, Longsuffering, and Faithfulness of the Creator to the rest of the World. Did they fail? Certainly some did, but not all.
Paul denounces the idea that because Israel, as the chosen of God, proved God's choosing wrong somehow, points out the benefits that came to mankind through the seed of Abraham. (Rom. 9:6)
"Not as though the word of God hath taken none effect. For they are not all Israel, which are of Israel:
The Promise has always been conditional on faith. We must place our faith in the Lord Jesus Christ, for He chooses those who believe on the Son. Clearly, God does not choose some and reject others.
What a beautiful portion of scripture...
This obviously does not mean some certain ones were chosen from the beginning of time, because we're called by the gospel of Christ. Called...not picked. The "conditions," as you say, are whether we have pleasure in unrighteousness or believe unto righteousness. We're "set apart" by the Spirit when we have faith in Christ.
2 Thessalonians 2:12-14 said:
That they all might be damned who believed not the truth, but had pleasure in unrighteousness. But we are bound to give thanks alway to God for you, brethren beloved of the Lord, because God hath from the beginning chosen you to salvation through sanctification of the Spirit and belief of the truth: Whereunto he called you by our gospel, to the obtaining of the glory of our Lord Jesus Christ.
We turn from the unholy toward the HOLY. We follow after foreign gods, or we follow hard after the One True God.
So it always was, so it is today. We must seek God with all our heart. Deuteronomy 4:29 - "But if from thence thou shalt seek the LORD thy God, thou shalt find him, if thou seek him with all thy heart and with all thy soul."