My god is more powerful than your god and if you don't believe in my god I will kill nonbelievers.  Islam is the extreme example.  Capture the minds of the youth and you can fill their minds with anything that in all logic has never existed be it god, allah, or the concept of a paradise after we die.  The facts are we as humans are hard wired to believe in something its in our DNA, get a child early and the brainwashing will last a life time. There is no real evidence of heaven, no evidence of 12 virgins awaiting crazies after they commit horrendous acts yet across the globe humans spend countless hours praying to something that does not exist.  This world would be so much a better place if there was no religion.