The Saudi "ulama" are known for their strong opposition to Shi'a theology, Shi'a communities in Saudi Arabia, and external Shi'a influences such as Iran and Hezbollah. Their potent hostility, combined with the influence of the 'ulama' within the Saudi state and the Muslim world, has led some commentators to blame the Saudi 'ulama' for what they see as growing sectarian conflict in the Middle East. However, there is very little understanding of what reasoning lies behind the positions of the 'ulama' and there is a significant gap in the literature dealing with the polemics directed at the Shi'a by the Saudi religious establishment.