I think his point is that a lack of belief in God can just as easily be forced upon people as forcing people to believe in God. "Atheism," is not neutral, and I would say that it is being forced and has been forced on Americans for quite some time now. Every time prayer and Bible reading is taken out of the public arena, that is the enforcement of "Atheism." Every time a school is sued for teaching that God created the universe, that is enforcing "Atheism." The removal of God is just the implementation of another god, which would be man, in the case of "Atheism."