Probably schadenfreude, annoyance and frustration combined, I would guess. The US politics are blastered constantly on your face on the web, news, everywhere, and dominate the discussions on Fediverse as well. Being here, you basically cannot escape, reading people from the US fighting each other about things, that sound asinine, in the context of many other cultures. I have observed this annoys many people (myself included, though I try to just avoid engaging), and with how the Trump idiocies fuck with the rest of the world as well right now, these combined seem to cause all sort of unhelpful lashing outs.