I agree personal responsibility is very important. Similarly about obeying the law. When someone stridently expresses a contentious opinion in a simplistic way, I think it's fair to expect some pushback and requests for elaboration.

Particularly coming from a newly-minted account expressing a political opinion: HN isn't primarily for political discourse. I've heard users say they create accounts to express opinions they think are contrarian and that they'll be downvoted or whatnot if they use their primary account. If you think the opinion you have is valid but unpopular and have created an account to express it, be prepared to back it up, or at least explain it.

The solution is to give anyone that passes a basic check a work permit that has a clear path to permanent residency and citizenship. We don't need to take violent criminals, there's little reason to turn anyone else away.