I'm now moving along in my thought process and starting to feel sorry for McKinnon. This injury is lifelong and it's effectively a "grieving" type situation. And a year on, he's clearly not through that process and nor should he be expected to be. It still looks like he wants someone to be angry at. And unfortunately, being angry at Smith works twofold - one being that he can't bear to entertain the thought that he somehow contributed to his own injury, and two being that Smith himself becomes the scapegoat. I would think sometime in the future he would regret what he's said, and regret how his thoughts have been manipulated by the media. As for his parents, who knows, maybe they're just going along with whatever Alex says, knowing that he needs support first, and guidance second.
Still, majorly sucks to be Smith. He doesn't deserve it, regardless of how I feel or anyone feels on previous actions. Just one of those situations you get in life where it's the situation that is fucked, no one deserves it, and it just needs to be recognised as such and move on.