Do you advocate execution of people in disagreement?
The historicity of the Bible has long since been exposed as flawed and even religious experts agree it is unsustainable:
http://www.arts.ualberta.ca/cocoon/JHS/a013.html
The historicity of atheists imposing their beliefs on others is wrought with executions and imprisonment. What you find to be unsustainable has sustained for thousands of years. There are those among the Muslims who will happily remove the head of anyone who provides "a full disclosure of the facts" in regard to their Koran.
How can an atheist impose beliefs, an atheist is a person who does not have beliefs about anything supernatural.
Religion has been sustained for centuries by people who were willing to prove their point by killing opposition. Civilized countries are past that stage, I'm not sure the US is yet.