Iran is a sovereign country consequently it has the ABSOLUTE right to defend itself against the Judeo-American axis of evil. .
....because we are so intent on murdering them and spreading terrorism around the world.... uh-huh.
No one says Iran doesn't have the right to defend themselves, but they played Community Organizer Boy like a fiddle, insulted and belittled him through the entire process, violated sanctions during the negotiations, and are proving now afterwards that their word never meant anything. The sanctions were lifted, they got an ass-load of money, they are trading for weapons with Russia again, and the only thing Obama got was a 'legacy' in his mind and a middle finger from Iran.
(The 'Chicago Way' used to mean you bring a gun if they bring a knife'. Thanks to Barry it now means you stick your ass in the air and your head in the sand while your adversaries rape the snot out of you.)