If Rove doesn't think she will win, that is hardly a rational excuse for going after AFTER she won the primary, and even after he had a chance to cool down and reconsider his anger. What earthly good does it do to attack her now, except to decrease her chances of winning even further. No, I think it's an issue of control. Rove is an insider. He gets to pick the candidates, as he showed in numerous state races while he was working under Bush. He really, really doesn't want anyone in the Senate who doesn't regard him with awe and respect. He's entitled to pick the candidates and tell them what to do, and he was flipped off by this nobody--as he thinks of her.
You could be right, I don’t know, I can’t read his mind. I think I’m probably exhausted from reading everyone’s suppositions.