>Americans are dividing themselves

That's where you're wrong, Americans were not dividing themselves this much until nations started directly influencing the public conversation.

Edit: I also don't want to imply that I think American agencies aren't conducting their own AI driven disinformation and "public sentiment shaping" campaigns. That's certainly a thing that is happening. If anything the US has a larger incentive to use AI for that, as here it would be much harder to keep the kind of programs China and Russia use under wraps, the "troll farms" which are like huge call centers for spreading misinformation, anger and doubt.