my entire problem with it is that it is a call for illegal vigilante violence

Or a notification that destruction of property won't be tolerated? Could be either. I mean really it could mean any number of things. As with most songs, it's intentionally vague. But you're the one going around proclaiming what's "obviously" going on.

Fine, remove the word "gun" from my point. He is still threatening violence which is an actual crime.

Also no.

"If you try to rape my wife, I'm going to kill you." Is this a criminal threat of violence? If it's preceded by "if" and *if *the consequences are perfectly reasonable given the situation?

Only difference is I'm being much more explicit.