We can take a current event, hong kong, besides posting memes on reddit and #thoughtsAndPrayers on twitter what are people outside of the region doing ? Nothing. You can be aware and upset about something, if you don't do shit about it you're better off taking care of your local community. I also doubt we can compare the vast majority of the click bait news spewed by mainstream media and the holocaust. There is a very big difference between a war next door and whatever happens in the other side of the world.
Let's reverse your argument, what about Vietnam, Irak, Afghanistan ? the US managed to (initially) get public support for those through the medias, are they a net good for the average citizen ?