The thing that amuses me the most about whataboutism is that it's so self-defeating if you think about it for more than just a few seconds. It only makes "sense" from the perspective of someone who thinks that everybody must support their own home country's actions no matter what. Which is an authoritarian thing, not a democracy thing.

It also doesn't account for the fact that I'm not even American, so when I see those arguments my "so what" shrug is doubly intense.