Maybe you can stop the insanity with a response like, “I will be attending anger management seminars, both evenings, to help me to deal with bizarre boys in a way that does not involve vilence. How bout you?”
Maybe he’s practicing that “Brevity is the soul of wit.” bit… but then again, chances are he can’t even place the quote. I say that email just sums him up really well - consider it a shortcut and a timesaver