Kim Ghattas joined me on the podcast to explore how Sunni Saudi Arabia and Shia Iran - who were once allies and the twin pillars of US strategy in the area - became mortal enemies after the revolution of 1979. In a war of cultural supremacy, we discussed the nature of various groups using and distorting religion, suppressing cultural expression and encouragning sectarian violence. And how did events like Iran’s fatwa against author Salman Rushdie lay the groundwork for more recent troubles, including the birth of groups like Hezbollah in Lebanon, and the rise of ISIS?