The US has a "left" it has just been beaten into submission and told to vote for D or it gets the hose again. And I think now it's realized it's not alone, and it's fighting back. This country fought a war to depose a king. This country fought a war to end slavery. This is a country that has spent basically all its history trying to protect itself and others from what exactly is currently happening. Yeah obviously they didn't do a great job stopping this earlier, but this is not a country that is going to let itself be taken over by conservative right-wing religious fascist authoritarianism, despite the current evidence to the contrary. The country just needs a little time to remember who it really is and shake some of the rust off, because yeah, it's been quite awhile since any of us in the west actually needed to fight for anything significant in our lives. But I also think it's silly to expect we won't. I don't think the great American experiment is over, I think it's going to continue and we're going to see how that actually works.
Maybe I'm wrong, but there are still way too many good people down there, and there are good people outside the US who want them to succeed too. The real fight will come eventually. It's anybody's guess when, where, and how. They may be down right now but don't count the US out just yet I think they've still got lots of rounds left in them.
I think we can all agree it's probably a bad idea.
Does that mean you shouldn't? Maybe. But maybe not. Sometimes it's fun to do something "wrong", because you want to, and maybe you'll really enjoy it anyway. Maybe you'll learn a lot about why it's a bad idea, and maybe you'll find those learnings enrich your life and give you stories to tell. I'm not trying to recommend this at all, I'm just saying you should consider it from all angles and outcomes before you make a decision, especially if this is something he really wants to do for whatever reason. Life is for living, it's not for making a series of optimal choices to result in the highest score. Experiences, both good and bad, are their own reward. And as long as nobody's going to get hurt, and you go into it with your eyes open and an understanding of the risks and potential downfalls, and do what you can to mitigate and protect against them as much as you can, maybe it's something you can try.
If it's really something you're not comfortable with, and he is, well then you two are going to have to have a long and hard talk about it and come to some mutually agreeable compromise. But even if it is objectively a bad idea, you also need to think about whether he's just naive and is going to hate it, or whether it's going to make him happy that he tried it, and whether it's an experience he needs to have in his life. Meanwhile, is it going to cause you resentment if you go there and hate it and he loves it? Will he listen to you if you decide you really do hate it and don't want to continue?
That's not something anyone can answer for you, but it has little to do with whether it's a bad idea and much more to do with what both of you want out of life.