If Charlie Kirk was a man with average right wing beliefs, that means that the average right winger is a racist, misogynistic, homophobic scumbag.
That just means the average RW person would be fundamentally evil, not that left-wing people are crazy.
It’s pretty simple.
The right believed that if you left them alone, they’d leave you alone.
Then a man with average right wing beliefs was assassinated and you all cheered.
Finally, they realized you were enemies and should be treated like it.