I think you underestimate hardcore MAGA's antisemitism, lol. And slightly overestimate the racism (which is more 'oldschool')

You are not wrong about Jewish mobilization.

There's just different stories told to different people, I think. Evangelical purists get the 'cultural contamination' story to sympathize with (as that's what they want in the US). Old folks get the decades-old broadcast TV version of Israel. MAGA and oldschool Republicans get the radical islam angle, hardcore MAGA gets a kind of altered reality where Trump is actually the anti-interventionists here (as they still hate Israel), he's just working towards that, somehow.

I really think most of the branding isn't 'brown people.' Even though there is a lot of islamophobia in the US, one of MAGA's core tenants is technically non-interventionalism, and most appeals to racism aren't so explicit.