West Wing, in the second season, has an episode where Pres. Bartlet pulled a thermonuclear rhetorical smackdown on an obvious stand-in for Dr. Laura. Full scene appears below the fold, but the basic point is that you can't take just parts of the bible literally and wield them as you see fit, which is what the politicized evangelicals are doing.
We need to make the case that Christian Fundamentalism is inherently flawed thinking - and the following speech (based on a letter found floating around the internet) makes the case as well as I've seen it made. Tolerance is fine in theory - but bigotry and stupidity on the level these people practice them went out with the discovery that the world was round. Their entire world view needs to be publically ridiculed so they simply cannot enter policy debate without everyone else snickering. (sorry if I'm not in the most charitable mood this evening).