Because it is easier to be against than for. Because "againsters" are always recruiting/guilting others into joining them?
Like the "x" as in Xmas. Why go ballistic, especially since it originally signified Jesus?
Why go postal over "Happy Holidays"? Or even the lame "season's greetings"?
No one has ever yelled at me for saying 'Merry Christmas."
Why should I expect/demand Jews, Muslims, atheists, whatever say "Merry Christmas"?
Take a breath, folks. Die on the right mountain. These aren't even hills...