Is it too much to hope for a catalysmic Sunni/Shiite muslim civil war?
Nope. It will happen. It's just a question of whether it will be before or after they've forcibly converted the whole world.
After they've killed off everyone else they'll kill each other for not being pure enough møøselimbs.
Killing is their #1 skill set. It's what they do. It's all they really know...