mysheli
Christians help the world.
How about the story of Noah's Ark in which God kills every single human being on Earth but Noah and his wife. I can see maybe about half but every single one but two people, come on that's not very nice.
Adolf Hitler was raised a Catholic and although he did not attend church he was still a follower (assumed from his quotes).
I believe today that I am acting in the sense of the Almighty Creator. By warding off the Jews I am fighting for the Lord's work. [Adolph Hitler, Speech, Reichstag, 1936]
I believe today that my conduct is in accordance with the will of the Almighty Creator. [Adolph Hitler, Mein Kampf, pp. 46]
This human world of ours would be inconceivable without the practical existence of a religious belief. [Adolph Hitler, Mein Kampf, pp.152]
Source:
http://atheism.about.com/library/quotes/bl_q_AHitler.htm
I could gave you more stories about how Christianity and or Christians haven't been all that helpful or kind.