<quoted text>It's not about the "selling", per se, but about the "pushing" of the "notion" of an atheist chaplain. You must be allowed to push before you can sell.
I am not sure what you think that that is supposed to mean.
Atheism is not a religion; SCOTUS (et al.) may lump it there for convenience in determining the rights of persons who have no religion compared to those who do, particularly when those rights are transgressed.
An atheist chaplain? Certainly, one could make a case for having someone within the military hierarchy represent atheists (and others, non theists, agnositics).
Yet an atheist cannot- I would said not in his/her good conscience- perform the duties of chaplain as they have been defined in the last couple hundred years.