Yeah, I don't buy JKR's spin either. From what I've read, Mulcair started going after Libby about the video BEFORE it got on Small Dead Animals, when it still only had 28 views. He caused the media controversy, he didn't stop it.
Maybe I'm naive. but I think Libby and Mulcair will patch things up.
In any case, they'll have to work together when they're both ministers in the next government.