Don't know what the fuss is about, the tradition(Rule) says that "the only requirement for membership is a desire to stop drinking". The individual has the only input into the truth of her /his desire to stop.
An AA group than can not restrict membership to anyone and honestly call themselves an AA group.
That includes Groups for just christians, women, men, and of course Agnostics. This of course requires a little common sense, and open mindedness.