Let's treat these issues separately. For Mehr please refer to WP:SOURCES.
For insurgencies, none of your sources are listing them as terrorism.  As for your claim that "some countries ..." please see WP:WEASEL.
As for the Shah. I don't think it provides any background information.  In fact, it highlights a huge flaw in this article. None of the tactics mentioned are unique to the Islamic Republic. many were practiced by the Shah, who often assassinated political dissidents, supported foreign insurgency, and disrupted conferences.