Constricted thinking will be the downfall of society. The tendency of those with a strict belief system or moral code to look down on or be afraid of those without one creates social discomfort that no one enjoys. An agnostic person does not want to be told he/she is going to hell for disbelief. A Christian certainly will not take it well when an Atheist mocks their faith. A recreational marijuana user will unavoidably clash with proponents of the gateway drug theory, just as people who hate the smell of cigarettes will find it hard to get along with smokers.
Our inability to get along with each other is mortifying. Our intolerance for difference is depressing. Our ignorance and prejudice are preposterous.
We are all the same. We are one. We must work together to move forward.