Where was the good guy with a gun?

Without attempting to be heartless ~
Karma.

A Suit and Tie Nazi still a Nazi.

I agree, but historically, all fascist take advantage of emotionally charged political situations.
Kirks assassination will empower Trump and change "things".

Nothing heartless about pointing out that a horrible person is no longer able to ruin people's lives

They haven't arrested the shooter but it hasn't stopped maga from blaming the left and screaming retribution for Kirks assassination.
It proves they only want violence against us.