I'd rather have them killing each other than killing us. Thank you, Mr. President!
i'd rather have "them" not killing anybody. In some sense though, I agree with your point- by killing their fellow muslims, "they" (al-qaeda/wahhabi types) are tarnishing their image. for creating this situation, we do have GWB to thank.
What will be really funny is if the Shia turn out to be our allies- for the fustian of the Mad Mullahs of Thehran, the Shia are (relatively speaking) much less strident/doctrinaire than the salaf. and the AQ boys have said that they view the Shia as their real, long term enemy.