I would just add that, in regard to Trump's reasoning on the travel ban and the "it's not against all Muslims, just those countries", I thought one of the most telling lines during his Presidency was the "shithole countries" remark. Not just because he referred to Haiti and African nations as "shithole countries", which is obviously terrible, but it was telling for the more forgotten part of that diatribe, where he lamented that "we should have more people from Norway".
It's telling in that the large majority of immigration in the United States has generally happened because those immigrating are trying to escape something.... again, all of my ancestors (who immigrated during various centurites) were trying to escape economic hardship or war. People in Norway? They aren't immigrating because, you know, why the hell would you leave Norway?
At best, it's just a fundamental misreading of the history of immigration in the United States... but I don't give Trump the benefit of the doubt on that.