the lizard brain

this doesn't explain every last bit of it, but it sure does explain a lot:

You know, there’s nothing more interesting than seeing a bunch of racists become confused and angry at a speech they’re not quite certain what he’s saying. It sounds right and then it doesn’t make sense. Which, let’s be very honest about what this is about. It’s not about bashing Democrats, it’s not about taxes, they have no idea what the Boston tea party was about, they don’t know their history at all. This is about hating a black man in the White House. This is racism straight up. That is nothing but a bunch of teabagging rednecks. And there is no way around that. And you know, you can tell these type of right wingers anything and they’ll believe it, except the truth. You tell them the truth and they become — it’s like showing Frankenstein’s monster fire. They become confused, and angry and highly volatile. That guy, causing them feelings they don’t know, because their limbic brain, we’ve discussed this before, the limbic brain inside a right-winger or Republican or conservative or your average white power activist, the limbic brain is much larger in their head space than in a reasonable person, and it’s pushing against the frontal lobe. So their synapses are misfiring.