> Being triggered because someone voice a different view about a political subject is neither hate speech or defamation

I haven't been following this very closely which is possibly why I haven't seen an example of this "political triggering" claim. Do you have some examples?

> Commonly, free speech is limited

I think you're talking about the governmental limits on free speech there - private individuals and institutions have no such constraints and can limit whatever speech they want (within the bounds of legally-mandated discrimination, obviously) because (as I understand it, I'm not a US lawyer) they're not bound by the First Amendment.