Just to clarify...

"We all recognized that there is violence, that there is sectarian violence. But the way I look at the situation is, the Iraqis looked and decided not to go into civil war."
-George Bush-

sectarian
adj
1: of or relating to or characteristic of a sect or sects; "sectarian differences" *
2: belonging to or characteristic of a sect; "a sectarian mind"; "the negations of sectarian ideology"

sect
n
1: A group of people forming a distinct unit within a larger group by virtue of certain refinements or distinctions of belief or practice.*
2: A religious body, especially one that has separated from a larger denomination.
3: A faction united by common interests or beliefs.

civil war
n
1: A war between factions or regions of the same country.*
2: A state of hostility or conflict between elements within an organization: “The broadcaster is in the midst of a civil war that has brought it to the brink of a complete management overhaul”