No, but at no point in their history has human rights (especially criminal rights) been anything but a disaster. Unless you're Nancy Grace.
I don't see how anyone can somehow side with the attacker or somehow think the "suspected" cheater deserved to be stabbed in the head. That sort of behavior being condoned by saying things like he had it coming for cheating is disturbing. Would you guys agree if someone was shoplifting something that you should grab a knife and stab them? Or pull out a gun and shoot them? The only reason for stabbing that guy in the head would have been if the suspected cheater was attacking him with deadly force. Seriously disturbing stuff to in any way condone.