I suggested he look at Dr Kelly Ross and Steven Dutch.
I should mention I have in fact seen religion motivate people towards all kind of things,-- good and bad.
This is what Steven Dutch says:
Given the endless ways religions can be subverted and co-opted, the wonder is less that religions commit evils than that they do any good at all. And given the way Marxism was transformed into an unchallengeable dogma in the 20th century, the simple-minded prescription of John Lennon's Imagine:
Imagine there's no countries
It isn't hard to do
Nothing to kill or die for
And no religion too
doesn't seem to offer much prospect of a solution. After all, Khmer Rouge Cambodia, Stalinist Russia and Enver Hoxha's officially atheistic Albania didn't exactly shine as beacons in the darkness. One could readily see, in a world where Lennon's ideals somehow gained supremacy, that a few generations later people who atavistically clung to national identities or religious beliefs would be ostracized and persecuted. Solely because of the threat they posed to peace, harmony, and all-round good vibes, mind you.
In fact, blaming religion for the ills of the world is a wonderful way to avoid taking a hard look at human nature. It's a variation on the "noble savage" myth and suffers from the inevitable failure of believers in the myth to ask how innately benign people could ever be attracted to repression in the first place, and how we can guarantee that eliminating all forms of repression in the present will prevent its returning in the future.