Personally my stance isn't so much that I think its "acceptable" as I think its "an unfortunate reality". Revolutions are not clean, ever. Individuals involved in it do bad things. Holding the oppressed to the standards of having a completly clean revolution (impossible) is just counterproductive. I support the revolutionaries even if not every action they take is morally right. I dont withdraw my support for something that is good on the whole because of individual acts that are not good.

Its also worth noting that Israel chose to put civilians on the front lines of a settler project, and that this is kind of the obvious consequence of that. It can easily be argued, I think correctly, that they wanted this so they could look like the victims. Despite them being the oppressors.

if u.s. "civilians" were intentionally aiding in the genocide their government is carrying out? yes, killing them would be 100% justified, no matter who did it or when.

Settlers are not civilians. They are non combat support for the illegal occupation.

Yeah you're right your right I'm just being a shitter sorry

However, your last question is a little interesting. I would support it If native Americans were slaughtering Americans while they were still stealing their land. Israel is contemporary colonialism, and because they can get away with it and still be the victims, that is white supremacy