Can you elaborate or say it again so I can understand your point?
What's to explain? Virtually everything he said there is some sort of generalized rant about the right, and yet when he starts talking about using evolution for political gain, you take it to be him revealing some sort of secret left-wing plan. It seems far more likely that it was a continuation of his rant against the right, that he was complaining that some element of the right was attempting use the issue for political gain. But, of course, there's no context to that phrase, so it's impossible to know for sure - imputing one or the other to him is simply hearing what you want to hear, in the absence of further information. Says more about the listener than the speaker, really.