Yes of course this is true. But Har-Tru would probably reply that religion can be used as a way to brainwash good people into doing bad things. This is not possible with atheism since it does not include any ideology (why would you suicide-bomb yourself because of your lack of belief in something?)
Well, religion is hardly the only thing that can motivate or brainwash people. Fascists weren't motivated by religion, and that still didn't stop them doing what they did.