"They don't get it."
Unfortunately for the USA, by spending decades as the self-appointed "leader of the free world" and imposing it's will on the rest of the world both politically and culturally, we DO have a vested interest in the political happenings of the US; we have a vested interest because the United States has made sure we all have a vested interest (as well as a personal interest, having good friends there and loving the place). Now that the US is no longer the leader of the free world, but a country led by a blithering idiot narcassist, we still have a vested interest as what Trump does send ripples around the globe.
So we are entitled to comment on these threads as what happens affects us directly, it's just we see US politics differently because we experience it differently.
People in the US can be so insular. They don't get it.