that God elects a nation out of love then finishes with her is Arminianism !
National election does not include all people in that nation. We can see examples of this in the Law that speak of people being cut off from the people, including anyone who rejects that "prophet" who would come (Jesus). The texts below show no future for the nation of Israel. Nor were there any in the OT seeing as the OT shows many times God's destruction of many parts of Israel except for a remnant that was always kept.
If God has a promise He is keeping with national Israel then why has He not kept his promise for nearly 2000 years!? Does God only keep His promises when He feels like it? If there really are unconditional promises to the physical seed of Abraham then how do you explain God's lack of keeping these promises? You can't say that in the end times God will do something again for national Israel, because this in fact makes my point. It would prove that all those years God was not working with Israel He indeed was breaking His unconditional "without repentance" promise. The phrase from Romans 11:29 has already been delt with. It cannot be made to contradict Romans 11:5.
Matt 21:43 “Therefore I say to you, the
kingdom of God will be taken from you and given to a nation bearing the fruits of it. 44 And whoever falls on this stone will be broken; but on whomever it falls, it will grind him to powder.”
45 Now when the chief priests and Pharisees heard His parables,
they perceived that He was speaking of them.
Gal 4:21 Tell me, you who want to be under the law, are you not aware of what the law says? 22 For it is written that Abraham had two sons, one by the slave woman and the other by the free woman. 23 His son by the slave woman was born according to the flesh, but his son by the free woman was born as the result of a divine promise. 24 These things are being taken figuratively: The women represent two covenants. One covenant is from Mount Sinai and bears children who are to be slaves: This is Hagar. 25 Now Hagar stands for Mount Sinai in Arabia and corresponds to the present city of Jerusalem, because she is in slavery with her children. 26 But the Jerusalem that is above is free, and she is our mother. 27 For it is written:
“Be glad, barren woman,
you who never bore a child;
shout for joy and cry aloud,
you who were never in labor;
because more are the children of the desolate woman
than of her who has a husband.”
28 Now you, brothers and sisters, like Isaac, are children of promise. 29 At that time the son born according to the flesh persecuted the son born by the power of the Spirit. It is the same now. 30
But what does Scripture say? “Get rid of the slave woman and her son, for the slave woman’s son will never share in the inheritance with the free woman’s son.” 31 Therefore, brothers and sisters, we are not children of the slave woman, but of the free woman.
The nation of Israel will never share in the inheritance of the kingdom of God. They can repent and join the Kingdom of God but they can't just stay where they are at and expect to enter.
2 Cor 1:20 For
all the promises of God in Him (Jesus) are Yes, and in Him Amen, to the glory of God through us.