Both sides craft a narrative that places all the blame on the other side. I think the blame is a giant mess on both sides.
If one side sees (or imagines) a tiger in a cage poked at and shot through the ankles, having poked his paw out to claw blood from his captor, those onlookers cheering such violence can be understood. It is not that surprising that people will cheer when the little guy gets a punch in, even if you abhor all the fighting. It doesn't require any fucked up ideology.