@mimidamnit,
define "destroy"
The atheist claim that religion is the cause of most wars are false, unless you consider religion to be the sum of money, land, and greed, which I don't think Christians believe it as such.
Atheistic individuals, including Mao, Pol Pot, Stalin, Hitler, and many others have killed more people in the 20th century, than any other war.
So I think what you are getting at is why do people tear down other people? Because for selfish reasons which has to do with bringing themselves up.