Why do some people celebrate his death? This was not a person who was declared as an enemy of the state. He was someone holding a public political debate. Can't they see that this incident is going to have extreme repercussions on their own welfare and the values they stand for? Can't they see the fear, pain and tears on the other side, that's gradually getting replaced by outrage and resentment? How do politics make people so blind to the suffering of the others? Doesn't the nation exist to support opposing ideas without such carnage? I know that Kirk has expressed opinion that downplayed the value of human life (like in case of gun rights). But how does that make the side that advocated for dignity, equality and empathy just suspend those values in his case?
You can't seriously convince any opponent with violence or hatred. And guns aren't the best tools for genuine persuasion. The mockery of their pain will only lead to their conviction and resolve. And at some point, it will become irreversible. Please don't let politics and bias cloud your judgment. This isn't a victory for your cause.
And no matter what sort of a person Kirk was, his role in this world is over rather abruptly. His grizzly demise displayed around the world leaves terrible wounds in the psyche of his family, friends, followers and numerous others. I hope that their pain doesn't mutate into destructive energy. I hope that they find the strength to overcome it and find peace.
They feel that someone communicating ideas that challenge theirs is such an affront - such a disturbance to their self-assured sense of personal rightness and superiority - that that person's death is a good solution.
Or to put it another way - they're like this because they're confident they won't receive comeuppance for being so. It's like a "what you gonna do?" frolic.