That Iran and todays Iran is different. there is a proverb "You become what you eat". Today Iranian eat/drink islam so they are different than that day Iran.
If you don't know the history, then please dig it up. Pehlawi Dynasty was democratic and liberal, they provided shelter/assylum to both Germans and Jews. Pahlavi refused to expel german citizens which cause massive defeat for him, same time he refused to give any jew in hand of german.
Today Iran is based on hate against USA and Israel. You can not compare Secular kingdom of Iran(with Democracy in one hand, like british parliament) to ISLAMIC republic (Theological state) of Iran.