So, why do need a month to celebrate black history? Why devote a measly 28 days (with a bonus day during leap year) to acknowledge what black people have done for this country? Doing so implies that it's ok to ignore those contributions throughout the rest of the year. Doing so implies that blacks still hold second class citizenship status here. Those who hate blacks aren't going to like them more during Black History Month. If anything, it causes resentment in bigots.
I'm perfectly aware that some white people who claim to think I'm wonderful would open up a vein if their son were going to marry me. Black History Month isn't going to fix that.