Isolationism was mostly your choice man... You weren't exactly friendly with the outside world:
Iran hostage crisis - Wikipedia, the free encyclopedia
You shouldn't blame "luck" for people not seeking diplomatic relations with you.
I remember reading something on 70ies Iran and from what I remember;
Iranian conservatists being even annoyed by tourists coming to Iran
what did you expect would happen after these people coming to power?
I am worried for Turkey too... but we have a few fail-safes to prevent sharia from taking over.
Turkish Army most importantly.