I can't understand the assumption that all black face makeup is fundamentally racist. I understand that it's possibly (deeply) offensive in certain contexts, but I can't understand how such malice can be attributed by something on Halloween of all times of year.
I had a (white) friend come to a Halloween party a few years back with a (black) friend of his, the white guy in black face, and the black guy in white face. They kept claiming to be the other all night, would only answer to the others name, even went so far as to swap wallets and present the others ID when requested. It was hilarious, everyone had a great time, people just got to be people.
I dunno, I just can't bring myself to believe that on such a basic level the intent of black face (or other gender/race imitating makeup) for an otherwise inoffensive costume has the intent to undermine, demean, harm, or insult any group of people.