Whether you think the person he killed deserved it or not is irrelevant, giving a free pass because of that sets an extremely dangerous precedent
It’s just patently absurd. It’s an angry mob. They probably didn’t even know the victim. They could turn on you, me, or each other.
Defending the right to unpopular and offensive speech is not the same as compromising with the speech. You can truly abhor what someone’s saying and not try to some them.