This is false. You are in a silo of misinformation, unfortunately. The Left that I see and know is not celebrating his murder. Progressives have been calling to turn down the tone on violence and for gun safety for decades. And look at that, the shooter was further Right than CK! That video is deliberately derisive and taking quotes out of context. Look to the very words of DJT himself who has successively manipulated you into thinking people you disagree with are radical.
Nothing like this. A few loose screws, nutters.
And more importantly, the Right in general does NOT cheer them on, or celebrate it, or gleefully laugh at the demise of their opponents.
Look around, read the comments, ask your leftist friends what the mood is in their circles.
It's not everyone, but it's almost all of them.
They think of conservatives as Nazis, so by that "logic" killing Nazis is perfectly justifiable.
https://video.nostr.build/dab4de0320bf3b7a0b81baea0c1434ced5e7b55f0d7cbeb5463675adc6f94fc6.mp4
Discussion
https://video.nostr.build/95801db2e1e81a6702153af013077b1de296089ddeed40e555d8093aee724df2.mp4
Let me guess.. more quotes taken out of context?
https://video.nostr.build/9e400da2590651f0c7da84ca6ac41353833d744a897468df2f98cbbbb18a80ec.mp4
These videos don't make the point you think it does.