Where is it written that only one group of people can celebrate what's important to them on any given day? I ask because every year around this time atheist begin to voice their frustration that Christians celebrate the birth of Jesus on a day that pagans have traditionally done their thing. Atheists seem personally offended that this is happening. It's like Christians were supposed to ask atheists for permission to celebrate Jesus' birth and we just neglected to do so.
And so I wonder. Is there some kind of rule somewhere that says only one day per group. Or is this just another example of the childish thinking that seems to go hand in hand with atheism?