Morgan, you have the right idea, but to be more specific, I believe the Butcher should:
1) Be subjected at length to vengeance by his victims, namely, the Iraqi and Israeli peoples. This should all be done in the public spotlight, with medical oversight to ensure his most painful survival for the next phase, i.e;
2) Be lightly armed and confined with his friends on the left, two or three at a time, say for a week, so they can get to know each other better. These would include the American Democrats and Canadian lib-left politicos who have been so supportive of him, as well as the rabid menopausal grandstanders such as Barbara Streisand and the Dixie Chicks (Svend would fit in both groups). This process could take years but should result in a better understanding of the consequences of their positions;
3) Be publicly and spectacularly executed, and interred in a hog’s carcass, facing Jerusalem. This would send a message to his Stone Age fellow Islamists that there are not 73 (or whatever) virgins waiting in heaven, only a lot of Virginians here on Earth.
Deterrent enough?