Maybe God's mistake was giving men and women brains so that they can think independently and come to their own conclusions about deciphering the good books.

Religion has always been questioned and tested by independent thinkers resulting in abandoning the written scriptures.

As long as there is a threat that others may not join/follow the flock, there will people who will undoubtedly preach these teachings.

This action can be counter-productive. It is similar to jamming food down someone's throat when they're not hungry.