Rom. 11:25 For I do not desire, brethren, that you should be ignorant of this mystery, lest you should be wise in your opinion, that blindness in part has happened to Israel until the fullness of the Gentiles has come in.
It seems to me that God is not done with Israel.
Absolutely true. The error usually comes about by defining "Israel" in a way other than how it is used in the Bible.