Bruh, are you unstable too or just an Internet dweller with one issue on their mind. This guy was being a dick, he wasn't even expressing his political opinions he was just being a fuckin loser - small communities don't need to suffer losers trying to ruin the conversation for no other reason than they're having a bad day.
Also, who says America bombed this guy? He could be a troll in Russia or a red pilled teenager in Tennessee for all we fuckin know.
Tagging doesn't block someone, it just lets you remember when you wasted time on someone before hand - so you can down vote and move on, or treat them as they've been asked to be treated. That's not censorship. And even if you block someone, it's only a personal block, I can't stop them from posting or commenting for anyone but me. Again, not censorship.
And even if it did, why would censorship be the wrong move against a person incapable of having an intelligent discussion regardless of where they're from? I don't need every assholes backstory to decide if they've suffered too much to be blocked, that's fuckin crazy. I guess I wouldn't be opposed to a thread designed to air out your grievances about a specific topic, but a community can't allow assholes to run unopposed because then it discourages good people from participating.
So no, your friend is acting like a dick head - they should be labeled and treated as such - and when they're ready to be a mature adult and talk about their feelings productively they should be allowed to. Make a thread sharing your opinions about how shit the US is, id happily participate, literally everyone in the world should have a bone to pick with the US. But don't defend random assholes for being assholes and pretend it's because you think they're upset because they got bombed - that's a level of crazy, unrelated back story creation that isn't valuable to the current conversation.