A few rather simple, but valid, observations. One, there are far more Christians than Atheists. Two, If the law requires equal opportunity to join, why don't Christians simply flood the Atheist organizations with Christian members? Since they would be in the majority they could simply out vote the Atheist members when they propose doing anything anti-religious. Three, if Atheists want to force their way into religious groups shouldn't we welcome them? After all, Christians could make it their goal to convert the Atheists. I'm sure that having every individual Christian, in a Church or organization, take turns preaching the Gospel to them, without letup, will encourage them to stay and might even convert some or all of them.