American defaultism generally defines the terms and scope of normal debate and discussion in most English language online spaces, but now their country is being run by something just flatly unacceptable. That clashes with those default norms that tend to assume US government positions must be ipso facto reasonable.
So we're all expected to just normalise and respect that those unacceptable things are just legitimate and okay and just ordinary topics for debate now, just because the guy in charge of that country and his acolytes do it. We're supposed to just calmly debate people's right to exist and be treated as a person, in the same way we might argue an aspect of taxation.
Basically, moderation standards haven't updated to deal with a situation where official state policy itself violates any reasonable terms of service and where the best response is "uncivil". That applies to the dehumanising of Palestinians, to Russian treatment of Ukraine, and to current American government policies towards trans people, racial minorities, the like. In such cases the standard of "civil" engagement gives way too much scope for legitimating and normalising heinous arguments.