Superhappies would ask you, in the name of fairness, to invent a symmetric rite of admission for atheists. Some Bayesian-obvious truth that would sound similarly unacceptable to their social circle.

For example, we atheists could get a taste of theists' feelings by declaring aloud that "women/blacks and men/whites don't have equal intelligence on average" and watching the reactions. A "bigoted" version of Dawkins or Eliezer could arise and argue eloquently how this factual statement is irrelevant to morality, just like the issue of god's existence. That was inflammatory on purpose; you could go for something milder, like the goodness of monarchy relative to democracy.