summary of the article of sunni-shiite violence

the article " As Syrians Fight, Sectarian Strife Infects Mideast", written by Tim Arango, Anne Barnard and Duraid Adnan is about the conflict between Shiites in Syria and Sunnites in Iraq and how the sects infects the Mideast. This article also explains who are their allies and how they help them in the conflict and also how the occupancy of Americans in Iraq influence the war.