In Dawkins case yes. Celebrating Christmas, singing "genuine" carols, and wishing people "Merry Christmas" is evidence of his blindness. I do not think that Dawkins is stupid or insane yet he sings songs of praise and joy to a God he "knows" does not exist and partakes in a birthday celebration of a savior he "knows" isn't real. And he doesn't see anything wrong with that. That is blindness. jw
I'm an atheist, I enjoy singing "genuine" carols. I also enjoy singing Handel and Brahms. I can appreciate the music while realizing that the supernatural events spoken of in the lyrics are mythical. Saying that atheists are blind for enjoying God Rest Ye Merry Gentlemen is akin to saying that Christians are blind for enjoying Frosty the Snowman...after all, they don't believe that there was magic in that old silk hat they found.
As for partaking in the celebration of a savior in which they don't believe, I've already pointed out that there's a huge part of Christmas that's secular in nature. I don't have to be a Christian to enjoy watching Rudolph the Red-Nosed Reindeer.