I don't see anything wrong with exporting weapons to Iran. Moreover, i think and support that Iran should get any weapon it wants (including nuclear one), since Iran is not in the war, and probable object of aggression.

Iran has the right to protect itself.

The situation is different, Germany at that time was in the bloodiest war in all history. For example, 50% of all Belorussians were exterminated by Germans during the war (that's only in Belorussia). You was providing 80% of all metal for the German weapons during all war. This metal was used to exterminate Belorussians, Russians and other nations. So you are responsible for that.