LOL! It just occurred to me ... what if Muslims wanted to put up a display at Rahmadan? Would the atheists feel compelled to "speak out"?I think the point is it's disrespectful to put the Atheist display right next to the Christian display. It's intent to get a reaction. So they can complain about the reaction.
It really seems that Christmas gets all the "display" because it is a majority of the population. As long as a government institution is willing to give display space to any religious group that would request same, it doesn't appear that the government is actually beholden in any particular religion; more like "allowing" any and all religions freedom of expression.
I would agree that the issue becomes more one of free speech.