This is horrible. We all agree with that. There are horrible people in the US who chant all sorts of horrible things, and laud horrible events in and at rallies and protests. That's long been established.
There seems to be a common theme of trying to slot these types of things into some left-leaning worldview. I may have missed it, but no one is defending this here. No one is saying there are 'very fine people' on both sides.