Shiites in general, have always been more secular, which it has deep religious reasons. So, no wonder if we find shiites to be more culturally close to western societies. But, the poison of political islam, coming from MB, changed this situation for some shiites. Khamenei has multiple times said that he has been a follower of Navab Safavi, when he was a teenager. Navab Safavi, the religious leader of "Fada'iyan e Islam", traveled to Egypt and became familiar with Sayed Qutb and Ikhwan al-Muslimin(MB), and he was the first shia scholar who brough MB ideas to Iran, ideas such as being anti jewish, pro-Arab, anti western, and supporting political islam. The older generation of leaders of iran, are poisoned with these MB ideologies since their childhood, so they just follow these goals. The young generation though, does not care about these old ideas. Another point is that Iranian Revolution was established when it was the peak of Pan-Islamism and Pseudo-Socialism in the world, and they inclined to these directions, but they were unfortunate since the world quickly changed after the collapse of USSR. But, it was too late for Iranian administrations to change the slogans that they were chanting for 10-15 years.