Which religion do you refer?
Religion basically teaches good things, to shape people's morale. To limit lust, respect others, etc...
Those who commit crime, insult, slander, even killing others are the one who uses religion as the shield. They keep their misinterpretation about the doctrine and try to influence and persuade others to have the mind like them. So, religion is not bad, the few people who use it to commit crime are the guilty one.
#peace
i am referring to the ISIS and those terrorist in Philippines,Maute, who claiming that what they do is for Allah. They killed christians, those who are not Islam and those cannot pray an Islam prayer they shot them in the head just like that.
Some are nut jobs who have been raised by their fathers to believe the radical/violent form of Islam, some are just pissed at the US for the collateral damage we've caused over the last decade+ (especially with the stories of the US writing off casualties to get a high valued target), and some are people from all across the continent who just want an excuse to be a murderer.