I think people have a lot of good responses especially about outrage fatigue. Also as many pointed out, people do care, hence the protests especially about Gaza. But even if everybody agrees that the atrocities are terrible people disagree on the solution. Historically the United States has been very involved in foreign affairs and trying to be some sort of glorified superman that went around beating up corrupt governments and improving lives in oppressed countries but it went terribly. It turned out that the US occupying these nations and fighting them just upset the locals even more and led to extremists and even more bloody fighting. Now days I think a lot of people want to help but prefer the government stay out of it. I think what is happening in Ukraine and Gaza is terrible but I don't want the US involved. Us sending soldiers and weapons doesn't help. Instead, I give to charity, and do the little bit I can to help struggling people.