Religious leaders used to restrict access to knowledge that would undermine their power. This restriction is no longer possible now that the information revolution has provided almost instant access to almost any information anyone could want to obtain. This fact should make the task considerably less difficult. That so many apparently sane and sensible people all over the world can believe in any part of any religion is a miracle in itself. They have caused and continue to cause more wars, more hatred, more fear and frustration than all the world's geological disasters put together.
Religion defeats itself.
Religions are by far the greatest shackles Mankind has ever had to endure. To list the atrocities committed in the name of religions would require a thicker book than the Bible. The money and time wasted because of religion is truly phenomenal. All the wages for more than 1500 years. Enough to make every starving child a millionaire.