If you find this horrifying (and I hope you do, because there can be no moral justification for celebrating murder), then I encourage you to really think about whether we would not be better off without such extremist language poisoning people's minds. We have to try to stop escalating, or the cycle is going to destroy our society.
I genuinely can’t tell if you realize that this is a description of the victim, and your comment could easily be construed as a justification for what happened, or if you condemn the action so heartily you missed that.
Which leads to my point: there are discourses around this that completely miss each other. That’s a huge problem because so many people will loudly express strongly held emotions and two people will read completely opposite view points. US public discourse is at a point where language, without copying context, is failing.
Saying “both sides miss each other” isn’t true either: I’m convinced one side is perfectly capable of quoting leaders of the other, even if they find it absurd, but the reciprocal isn’t true. Many people can’t today say what was the point of one of the largest presidential campaign. They’ll mention points that were never raised by any surrogate or leaders. But they can’t tell that because the relationship is complete severed.
I don’t think there’s a balanced argument around violence, either: one side has leaders who vocally and daily argue for illegal acts violence, demand widespread gun possession vs. another where some commentators occasionally mention that violent revolution is an option, but leaders are always respectful. The vast majority of people who commit gun violence support one particular political movement, even the violence against the leaders of that same movement. If that’s not obvious to you, I can assure you that you are out off from a large part of the political discourse about the US, not just around you, but internationally.