“To them [the Israelites] belong the patriarchs, and from them, by human descent, came the Christ, who is God over all, blessed forever! Amen.”
Listing the advantages of the Israelites, Paul mentions the greatest of all: Jesus was born of them. They had the best position to appreciate and follow him.
The Jews rejected Jesus. Some today seem to forget he was a Jew. They also forget he is God in the flesh. They make him out to be what they want. Do I do the same?