Agenda? LOL, I think at this point it's that I'm just fascinated that you either can't or refuse to understand. Per the NFL, the defender is deemed a defenseless player (penalty) when the path of the offensive blocker is toward or parallel to his own end line. It doesn't matter what direction the blocker is facing, nor how much bigger the defender is than the blocker. To the letter of the rule, the only way this isn't a penalty is if McKenzie is moving at an angle that is forward when he hits the defender. If you think he is moving toward his own end zone or at an angle greater that the yard marker, then lets just agree to disagree.
I am not arguing that the rule is fair or just. Like many rules, it has flaws. In this case there wasn't much McKenzie could have done beyond maybe ole'ing the guy past him or letting him run into him. But the rule is the rule, and I'm saying that the refs applied it accurately in this case.