This one usually requires Duct Tape(c) to put the pieces of their heads back together after the explosion.
If they're online I give them a link to the SPLC timeline on Fred Phelps and show them the connection between Gore, Clinton and Phelps. Also there's the David Duke website where Duke pledges his support for Cindy Sheehan.
Now I'm waiting to see how liberals react to the KKK anti war rally.