I wouldn't suggest that Marx is in the same tribe as people who don't like Bush. I would, however, suggest that Marx is within the Overton Window for such people and that Bush is not, and that has similar effects to actually being in the same tribe.
I don't think going around and making a violent revolution to get rid of capitalism is within the overton window of most people on the left in the US.
Another month, another rationality quotes thread. The rules are: