This quote illustrates what an anti-theist is. Someone who is against religion because the believe it to be harmful. This was included in the board because he helps to show the difference between atheism and antitheism.
The fact that you can have an absolute like "true morality" requires that there be a standard of morality. How is there a standard if there is no God? If a supreme being is not in the picture, there can be no morality at all.
Banning religion is a terrible idea. Stupid opinions should never be legislated against. The best we can hope for is damage limitation. The separation of church and state is a necessary damage limitation measure in an age where many people are.