The ONLY justification for war is a direct threat to the United States.
Iran has been chanting "Death to the Great Satan" for 30 years.
How do you kill a "Great Satan"? It's spelled E-M-P. You need: one nuke, one boat, one scud missile. They have a boat. They've exploded scuds at the requisite 100 kilometers. They'll have that nuke within a year, if they don't already.
Pat, what part of "direct threat" did you not understand?
Our folly is that after winning two wars in Backwardistan, we then proceeded to bankrupt ourselves playing Nurse Ratchet in the Muslim asylum. Now we can barely afford to contemplate, much less fight, the new Muslim threat -- Iran.
But we most certainly can not afford to run away.