We shouldn't have enemies unless other nations actively fuck with us. I don't see Iran doing much to screw with us the way say China does with constant hacking and espionage. Sure, they support some groups that don't like us, but we keep sanctioning them and making life difficult for their people. It's petty how we're so powerful militarily yet feel the need to act hostile towards smaller nations. Of course, that's because there's money in weapons contracts, but I digress.