I don’t think it is that complex.Evangelicals’ well known support for Israel is deeply rooted in the Christian Bible, and their literal interpretation of the scriptures. Numbers 24:9 (Genesis 12:3) “Whoever blesses Israel will be blessed, And whoever curses Israel will be cursed.”
Evangelicals were the ones Trump listened to, more than other stake holder, when it came to Israel. The former President specifically said he moved the US embassy to Jerusalem “for the evangelicals”, following their persistent lobbying.
Trump is a white supremacist. It is that simple. Same with Dutton.
And Trump harvests votes. White supremacists votes. Evangelical votes. NRA votes. He says what he has to say to get the votes he needs. He does not care one bit about what they want - they will let him grift so that is all that matters.