In the book he makes a very good case for there being no objective moral code once God is whited out of one's worldview. The result is nightmarish:
"People are raped in this world, and rape is evil. Because evil exists, there must be no God. Because there is no God--no authoritative standard over creation--the badness of rape downgrades to a mere matter of societal taste. Ethnic cuisine, ethnic ethics. In God's absence rape is no longer fundamentally evil. In our country, you'll get confined to a cell (if caught and convicted), but that just means we enforce our taste, not that our taste has any real authority over anyone else. In other societies, girls have been passed around and traded like baseball cards. Is that right? Is that wrong? Neither. You like exploitation; I like apple pie."
Ultimately the preference of the most powerful will win the day. No rule of law. And we were promised freedom by the new atheism. May God stem the tide before the darkness falls on us.