I got a visit from a couple of Jehovah's Witnesses a few of days ago, and they seem to be getting a little more discreet. The last time they were here they didn't even say who they actually were and hid their copy of the Watchtower in another magazine.

This time they started out by asking me if I thought God valued seeing people of different ethnicities, backgrounds, lifestyles, cultures etc. I immediately said I was an agnostic (since I'm both atheist and agnostic). He didn't know what that meant which I found odd considering he goes around advocating his religion door to door (judging from the look on his face he probably thought I was part of some demonic cult

He went on to talk about how God foretold that people would do terrible things in his name, which is why religion is "supposedly" responsible for so much harm. I had never heard this argument before, but I do know that I am fed up with apologist nonsense, saying things like God DOES actually value diversity, and that religious atrocities were not committed by TRUE followers of God, so they can get on people's good sides.
Since they'll probably be back in the near future because I wasn't nearly as unwelcoming as I should have been, I'm wondering if anybody can let me know where he might have gotten his arguments, and any other good material for debating a JW since I'm not too familiar with the specifics of their religion.
Thanks!