You're in denial about the fact that the America you're talking about has already ceased to exist, it has imploded and the regime that replaced it is controlled by a satanic, mostly Jewish cabal that hates you and is preparing to genocide you for being white and christian.

Literally the face of the regime you'd die for: https://www.youtube.com/watch?v=LChKtr_rmYc

To answer your question, yes, I would root for Iran, no doubt about it, and enthusiastically so. Traditional Islamic values are more acceptable to me than America's prime cultural exports, such as industrial-scale mutilation/sterilization of children, anal fetishism and negro supremacy.