I find it pretty disingenuous that he finds his righteous indignation for these posts, and never mentions anything else that the repulsive wing of his fanbase does. Or for that matter, anything that ANYONE else does. He doesn't care a thing about Holly Rowe, in fact, I'd actually argue that he's glad to see these posts because it gives him a reason to rend his clothes and feign outrage and make all BYU fans look evil. It's hypocrisy.
He hates BYU so much that he's willing to draw attention to those dumbs posts, thereby making the insults more circulated and drawing more attention to them. His motivation is hurting BYU, not righting any wrongs.