Here is a quote from one of the founders of AA:
"In AA's first years I all but ruined the whole undertaking with this sort of unconscious arrogance: God as I understood Him had to be for everybody. Sometimes my aggression was subtle and sometimes it was crude. But either way it was damaging - perhaps fatally so - to numbers of non-believers. Of course this sort of thing isn't confined to Twelfth Step work. It is very apt to leak out into our relationships with everybody. Even now, I catch myself chanting that same old barrier-building refrain, 'Do as I do, believe as I do - or else!'"
"The Dilemma of No Faith" by Bill Wilson, AA Grapevine, April 1961
AA groups have business meetings where one can bring up issues such as the religious content of meetings. Newcomers are welcome at these meetings--I participated in a couple of the meetings where the format of our "Mindfulness" meeting was set, and had only been an AA member for a month. I read the above quote at the meeting.