Let me start by saying that I am in no way trying to be racist or anti-Semitic. I truly do not understand the mental gymnastics that these people are doing. I’ve been wondering for quite a while is how can America have so many white christian nationalists, and people who are completely freaking racist about EVERYONE not white christians, but all the while they seem to support Israel which is a Jewish state. Which goes completely against the white christian nationalist movement. How do these people reconciliate those two things? Are they just complete hypocrites in their beliefs?
To add to other answers, the existence of Israel is an important checkmark in the Christian end-of-days mythology.
To be more specific, there’s a strain of white Christian nationalists that believe the book of Revelation predicts that Jews will rebuild a third temple on the Temple Mount site and resume animal sacrifice before the rapture or any other end-of-days event can occur.
To these people, activities that make that outcome more likely are laudable expressions of faith. There’s even a group that is trying to breed a perfectly red heifer in Texas, because apparently you need to sacrifice a perfectly ritually “clean” and unblemished red heifer in order to properly kick off a new temple.