I'm terribly sorry. Believe me when I say that I am typing in a very calm, soft voice. Wearing a sweater.
I don't actually know what the rule book says, or why. I do know that after Warren Sapp performed this same, unfriendly contact, on the center of the Green Bay Packers, who was also not actively trying to block anyone, or making any real effort to make a tackle, and blowing out his knee, it initiated the changing of the rule. I don't exactly when the rule was changed. I cannot give an explanation of the wording.
I wrongly assumed that most knew it. I'm actually shocked, that so few do.
I apologize for my insensitivity.