Religion has nothing to with the evilness of an individual, true religion or otherwise. It doesn't matter if you hang your life on the cross, the dharma wheel, or some other symbol of faith because if you have not looked at your own potential to act in both good and evil ways, then you are mislead by your mental whims and the lies we tell ourselves about how "good a person" we are. "Good" people do evil things; this is a fact that cannot be avoided. Likewise, "evil" people do good things. What no one looks at is the cause for the motivation. Why are people motivated to do certain things? What would it take for a "good" person to do evil or a "bad" person to do good?