What I love about this post is the honesty. You let us see into your inner "Italian" for lack of a better word, but I can say for sure that I also have little tolerance for people like this.
I have a little Irish guy on one shoulder ready to shake someone's neck, and a little English dude on the other saying, "I do say, he is an unpleasant fellow." It's always hard to know which side of me will respond. (Hey, I think I just thought of a new Medium story).
This guy was technically breaking the law. Verbal death threats are taken seriously by at least some police jurisdictions, although the cops in your jurisdiction are probably a lot like this guy. :-(