Not all Christendom recognizes the way that the destiny of Jews and Christians are intertwined. Some go for viewpoints that are so supersessionist that they do not even allow a modern divinely blessed role for the Jews. Cruz had the right to highlight that fact. He could have soft pedaled the issue, but didn’t.
Our priest (Catholic) tells a story once a year during Passover, because there are still echoes of the whole “Christ Killer” thing even now.
The Almighty is talking to the Son, before the Nativity. He says “My Son, the Jewish people are my chosen people. I promised them that. Yet humanity has taken my wish for them to be fruitful and multiply more seriously than all the Commandments combined. They are yours to bring Home.”
It’s a silly little story, I know. But it gets the point across, quite clearly. Fr. Peters is a very smart man.