If some applicant has been posting “death to America” or about how they plan to do some white collar crimes for years, or it turns out they are the brother of some guy who is on a most wanted list, we probably shouldn’t let them inside.

If they post some opinions about how things are going like “hey their president is kind of a blockhead and I think the people deserve better” then I would be against blocking them for that reason.

I’m American but live outside the US. I’m fully subject to their immigration laws which includes passing their screenings, and unless I were to disagree with their sovereigty I have to accept that reality. I can hide my social media but then I might have to go.