I'm a Christian and I understand that there are other religious holidays or agnostic or atheist beliefs in December.  It is inclusive to say; "Happy Holidays" or "Have a great winter break!" Instead of assuming "Merry Christmas" speaks to all.  Donning a black face is insensitive and stupid.  I am, however, protective of a person's right to be racist and wear whatever offensive costume he or she wants at a private party.  Shame on her, but she is allowed.  This reminds me of Molly Ivins protecting the rights of the KKK to have their parade.  This is freedom of speech, right or wrong, sensitive and inclusive or insensitive and exclusive.