In the Middle East, the battle between the Sunnis and Shiites has been going on for quite some time. With one and a half billion Muslims in the world, it is extremely unlikely that they are ALL involved. In fact, this age-old conflict isn't even about religion. Check out this episode to see what the Sunni-Shiite conflict is really about.
Learn More:
World's Muslim population more widespread than you might think
http://www.pewresearch.org/fact-tank/2013/06/07/worlds-muslim-population-more-widespr
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