Michael Moore, in his latest opus, "Dude Where's My Country?" Offers some advice on how to talk to your right wing brother in law. I think it would also work for morons.
I really don't think much of myself for saying this, but Howard Dean DOES have a number of supporters from the right. If your moron can read, you might send him to Dean's web site. The magic phrase, "Dean balanced the budget in the state of Vermont while cutting taxes twice," Works well on conservatives.