But to do that you must suspend all reason and attempt to argue from a position of absurdity. Once you eliminate God the concept of "morality" is meaningless and consists of nothing more than personal preference or social convenience - neither of which has any necessary claim to my allegience.
that there IS an objective standard that everyone, including atheists, attempt to argue from, and, ironically, against the existance of such a standard.
To befuddle an atheist, make him apply his strict standard to his own argument. You can't argue that your point is "logical" or "reasonable" when you are attempting to prove that logica and reason are the result of random blind processes.