ask him some these questions:
1.) “Would you have sex with a man to stop a terrorist attack?”
2.) “If lowering taxes results in increased revenues then would lowering taxes to zero result in infinite revenues?”
3.) “If you had a time machine, would you travel back in time and abort Bin Laden?”
4.) “Would you torture and kill Jesus to ensure mankind’s salvation? And how does that work?”
Update: See the comments to join a barely civilized political debate.