External factors with their own agendas which cause confusion in the ranks of Muslims using religious scripts( ayats, hadith etc) to which muslims with weaker faith or little understanding of Islam, fall as victims.
External factors are intelligence agencies of certain countries, influential people in certain regions with own motives seeing muslims as a threat etc.
Muslims kill when they are threatened and attacked, israel is an example, Kashmir is an example etc.
Hindus even kill babies in the name of Bhagwan.
and I will now post how Hindus kill for religion.