Muslims have been slaughtering Muslims on any number of justifications and rationalizations from the start: So what can the open non-Muslim--such as the Western infidel--expect?
How Muslims Justify Killing Other Muslims in Islam's Name
PJ Media
Those who claim that terrorism committed in the name of Islam has "nothing to do with Islam" received much ostensible fodder by way of the recent spate of terrorist attacks in Bangladesh, Iraq, and Saudi Arabia in the closing days of Ramadan. Because these three countries are overwhelmingly Muslim majority, the talking heads are now sure of it: the terrorists are just that--terrorists who have nothing to do with the religion of Islam, which in fact bans the indiscriminate slaughter of fellow Muslims.
Consider the following outpouring of "told you Islam wasn't responsible for terrorism" as compiled by Robert Spencer: