Muslims kill and terrorize other Muslims because they perceive them to be "hypocrites" and thus, "infidels" as it says in the Koran. Infidels are non-Muslims and as such they are open for attack. Hypocrites are considered Muslims in name only, which equals non-Muslims. This is also a two way street. The Muslims who attack other Muslims one day, can easily be attacked by their victims another day. Just more proof that there is no peace with Muslims.