"We're all atheists about most gods societies have ever believed in. some of us just go one god further."
This often repeated statement is merely an empty truism. We already know that Christians reject the gods of other religions and atheists reject all gods. But restating a fact in a clever way does nothing to challenge the existence of the "one God" mentioned. At best, it demonstrates that atheists aren't the only skeptics. It's as pointless as saying, "We're all bachelors when it comes to other men's wives, I just go one wife further". To have a rational debate you must give substantive arguments rather than empty truisms.