US foreign policy thoughtlessly interjected in Islam's Sunni-Shia divide

Watching PBS Newshour report on civilian casualties in Yemen from American support of Saudi blunt airstrikes shows how our foreign policy thoughtlessly interjects itself in Islam's Sunni - Shia divide.  We have no coherent grand strategy to pacify the region with which to judge a tactic, such as lending support to Saudi Arabia on a lunatic mission.