Reality. One more time to help fucktards understand.

"How do you know Islam is fake?"

Islam (aka the world's largest terrorist organization) is fake for the same reason the Christian Death Cult is fake. The Magic Man (aka Allah, Jeebus, God, Zeus) is not real because the thing is impossible. There is no supernatural magic in the universe.

One more thing: Anyone who isn't a hardcore atheist (100% certain magic god fairies and Easter Bunnies are not real) is insane.