Do you really think the Trump administration is committed to its pro-Israel position? If they flipped sides, how long would it take for 90% of their voters to adjust and be happy again?

It is perhaps the deepest position on the American right now, and extremely unlikely to shift.

To the point that you have people who have politics that derivates from a populist/nativist right wing historical current that was always virulently anti-Semitic, now being the staunchest backers of the current Israeli government.

In the post-9/11 era, hatred of Islam, putting an equals-sign between Jewish and Israeli, and smearing anybody on "the left" who criticizes the actions of the Israeli state as "anti-Semitic", and shoring up the Israeli state with massive financial support ... this is all an ideological bundle that is working extremely well for them.

And is allowing them to siphon off support from "moderate" American Democrat voters who share these biases but not the rest of their ideological bill of goods. It's actually allowed them to build a powerful base of support even when they're doing extremely controversial things.

Given their positions on things like Russia, the Epstein files, free trade, etc. (where the position has changed from things that were either broadly "American" values or positions that Trump directly supported) I would guess it would take a day or two. The core "Trump is infallible" demographic will follow him no matter what. If he said the sun set in the morning, they'd blame the sun when it rose.

Whatever Trump personally feels, he is demonstrably acting in Israel's interests. Maybe they have him blackmailed through Epstein stuff, or maybe he supports Israel due to his family connections or bribes. It doesn't really matter, the end result is the same.