It wasn't murder though. It was self defense/defence of the innocent.
If someone was actively on a homicidal rampage, blood still on their hands as they sprint to kill more innocent people, it wouldn't be murder to stop them even with lethal means.
This guy is responsible for thousands of deaths, and showed no indication he was going to stop. Killing him alone doesn't stop all the innocent deaths, but if it gives is peers reason to pause their own murderous rampages, even briefly, that alone could save many people.
I'm not signing for a murderer, I'm simping for a goddamn hero.
I'm not celebrating that a bad person died, but that the bad people are afraid. It's fucked up to think any justice was delivered from the death of one guy. The justice comes from how this motivates people to work towards systemic change; a world where these rich sickos are held back rather than encouraged. These rich people are not like us, and their panic is driving that truth home. Make them panic more. Let them widen the divide between us and them. Force them to show their true colors.
Simping for him is the right thing for us to do. It furthers his act of terror against the rich without spilling any blood. It doesn't matter that it's an empty threat for most of us; the more we celebrate him, the more people will take out their anger on the best targets imaginable.
If we don't do it, that lonely white man will just shoot innocent people for infamy like they've been doing. They will join the cops or vigilante fascists in lynching trans people of color like me to scratch their itch for blood. This agitation propaganda is helpful in combating the agit-prop from the right. They've been doing stochastic terrorism against children for years, so fuck them and their mother if they complain about civility.
We're in a state of nature now, with no political or economic sovereignty to speak of. We don't have any human rights thanks to these rich idiots not appreciating the sweet deal they had, so I only feel empowered when I call their murderer hot.