Bush's inability to talk straight

What was Bush talking about on that last speech? At one point he said, "They {insurgents} attacked the Golden Mosque because they are not strong enough to face the colition and Iraq army {I can't be sure that this is word for word, but the gist is there} and they seek to create a civil war." How can insurgents want civil war when apparently they are too weak to fight the opposing army? If you have any ideas, let me know. Republican logic is beyond me. Maybe I'll return later with a theory.