Intelligent people need to stand up (which we are starting to do) and call BULLSHIT whenever some fool brings up the idea of religion. The only reason religion propagates is because ignorant parent passes it on to gullible naive child.
The internet is helping - any fool can now look online and see proof that the murder of millions of people by a great flood never happened.
Indeed, alas Islam is sweeping over the planet like the plague... It's brutality for suggesting the Koran could be wrong is pretty scary. Perhaps when we move past oil it's financial situation will cause it to lose it's insane grip.