I'm gonna separate this from the far right/racist accounts mentioned in the OP, and focus on ideology. I do think there needs to be an ideological reckoning on some of this, and I think a lot of people showed their ass. When the Israeli attack began there were multiple people cheering it on and claiming it was some revolutionary act. I saw multiple people, including academics, argue that Israel (including citizens) was solely responsible and as colonialists/settlers the victims were not civilians. I don't think it's particularly extreme or ridiculous to point out the same people believe the same things about white Americans, and that the "revolution" certain people want will include a lot of normal people being assaulted or worse.
Obviously the good news is that communist-types in America are so disorganized and effete that they'll never take up guns for anything, but the right wing is gonna bang that drum and scare people regardless. I'm more interested in what certain people think. Do I think Israel's occupation is the ultimate problem in that region, and the Palestinians have been given the choice of slow extermination or dying on their feet fighting, unless massive international changes are made? Yes. But that doesn't justify killing innocent people, or executed a grandma on Facebook Live. That's objectively wrong regardless of context and there's no question that certain people have reached an ideological and moral dead end on this topic.