I do agree with Bruce that the dismissing of the blatant racism to talk vaguely about how charges of racism are overused is a racist (in the sense of a socialized response and coming from a privileged position) action. It happens in the relevant lj groups often enough that most have specific rules about derailment. Hopefully, we can continue to be a little more casual about that here at soulforce. The point is, while conversationally on-topic, because it happens so often it's important to make a deliberate effort to not redirect conversations about racism (or heterosexism, or any other kind of oppression).
Within context, it would seem that the point Brian was originally trying to make is that this cartoon is a criticism of Obama and not racist, a point which he has since changed his mind on.