Should somebody take out Irans Nuke facilities?

http://www.thefirstpost.co.uk/index.php?menuID=1&subID=346

Excellent article about the two most oft-heard arguments for NOT bombing Irans nuclear facilities. I don't know Edward Luttwak, but he makes confident, coherent arguments. I would like to hear what the most persuasive arguments are for not bombing Iran. I can't think of any myself, but I'm always open to new thoughts.