It seems strange because the left is still more tolerant than the right. There is an intolerance for intolerance, but you cannot tolerate intolerance and have a tolerant society.

By and large, most leftists celebrating it are being too welcoming of violence. However, we do need to keep in mind that the person who was murdered advocated for societal harm and revocation of rights for certain people. He advocated for political violence against them.

Murder is still wrong. But that doesn't mean Kirk's hatred should have been tolerated. He should not have been killed for it though.

A man who presided over a broken system passed away.
It's a shame a man died, many people die every day.
It's a shame the usa health system is broken.
It's a shame to take a life.

I don't pay much attention to these subjects. Just because they're on the news, I get to hear them rehashed at work and on my recommended for youtube. I look in enough, see what sucks, and move on. Things are usually not so complex through my eyes that way.