When I was there, I never ceased hearing from them how evil the British and the Russians (in that order) were. Yet, they did tons of business with the Russians and I noticed there were far more British expatriates than Americans working in Iran at the time. We have now replaced the British and the Russians as the great evil but given the Iranian ability at haggling and the personality conflicts of Persian Empire(s) and self deprecation, I suspect that the dislike that best serves will be that voiced. I also suspect they could and would throw in the Germans, the French, the Canadians (for their wireless technology) and / or the Bahamas if that suited...

and San Marino...