You know, I have always wondered what motivates people to do vile and despicable things. It is part of the reason I became a psychiatrist--to try and understand that dark side to human nature.
The evil within men's souls (and women's, of course) hides behind many different masks. Here is an example of the darkest and most depraved side of human nature masquerading as comedy.
Your mask is slipping, Mr. Franken. If you take it completely off, even you will be able to see how much in common you have with Mr. Zarqawi.
(H/T The Anchoress)