No. Atheism is NOT a religion. It is the exact opposite.
Write "none.
Well, a more personable way to do it would be in person, rather than through facebook. But don't feel that you HAVE to do it; it's not something that everyone has to know, and you can just leave it blank. Although if she's quite liberally minded, I'd assume she wouldn't be too upset about it.
And I wouldn't worry about being left out of Christmas, I know very few Christians who would leave any of their family members out of their celebrations for religious reasons. SQ: It depends how devout said parents are. My parents are Christians, but they wouldn't cut me out if they knew I were an atheist in the same way a bigoted family would if their son were gay.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.