AveryGamerDude

It being legal to threaten you harm and it being illegal for you to defend yourself. 

@Sassy the Sasquatch Well it must be because I've gotten threats of death so many times, and I'm pretty sure if I found out where they lived and killed them, I would face charges.

A threat does not give you the right to do something worse which is doing the actual deed. 

There is a clean line of what is worse. 

If you found out who the individuals were, you could contact the police and things could be settled the legal route, by the rules. 

Proposing to actually kill them is not winning you any favors nor giving you the moral highground. 

I recommend that you do not meet extremism with extremism.