He's not trying to win a war. If anything he wants to prevent one and fears a right-wing backlash more than a left-wing victory. I believe he has said as much, but he says a lot of things in a lot of places so I wouldn't be able to provide a citation.

He used to be fond of saying "If you can't understand why someone is doing something, look at the consequences of their actions, whatever they might be, and then infer the motivations from their consequences." The consequences of his actions quite clearly are "the right never fights back against the left", so based on that one doesn't have to think very hard about what his motivations might be.