> if the caption were promoting the violence or poking fun, it would come down. But in this case, since the caption condemns the fighting, the moderator is told to leave it up with a “mark as disturbing” warning

This sounds exactly right. How the heck are we supposed to confront and fight society's ills if any video highlighting them is immediately deleted?

Maybe if people were more aware of the shocking problems that people are facing in the world, they would be more inclined to act upon it. Out of sight, out of mind.