Why is your religon true and not the religion of others?

Although im an atheist, i often wonder what makes you theists so sure that that your religion is the one true religion.for example:
why do you think allah is not real? Why do you believe that perun, zeus, odin, Thor, Vishna, Shiva, Ramma, Jupiter, Mars, Mithra, the grate đuđu up on the mountin and all the others are fakes while your god is the true one.and on a noter note why do you believe that you version of the bible is the true word of god, and all the other versions interpret the word of god wrongly?

Thread copied to the Why is your religon true and not the religion of others? thread in the Faith and Belief forum, this copy of the thread has been closed.