- Sarah Palin
Syria explained: How it became a religious war
(CNN) - How did Syria go from an internal uprising to a wider clash drawing funding and fighters from across the region?
In a word, Middle East experts say, religion.
Shiite Muslims from Lebanon, Iraq and Iran have flooded into Syria to defend sacred sites and President Bashar al-Assad's embattled regime. Sunni Muslims, some affiliated with al Qaeda, have rushed in to join rebels, most of whom are Sunni.
Both sides use religious rhetoric as a rallying cry, calling each other "infidels" and "Satan's army."
"That is why it has become so muddy," said professor Joshua Landis, director of the Center for Middle East Studies at the University of Oklahoma. "The theological question has returned to the center."
That's not to say that the warring parties are fighting over, say, the definition of God.