It's not difficult to find tons of dirt on the guy. Just type his name and "adulterer", or his name and "communist", or his name and "plagiarist", into a search engine. If you think these are all internet fables, rest assured that snopes is not exactly a bastion of right-wing extremism. It's especially problematic that he clung to the title Reverend throughout his public life. Palling around with communists and whores is not a lifestyle worthy of being revered. But he was an excellent speaker (even though some of his speeches had plenty of borrowed thoughts and words).
I would suggest that today be called Racial Equality Day instead, but where's the equality when the only reasons that his dirt is swept under the rug are that he's Black and martyred? Where's the equality when we have Black History Month every February, but no Asian History Month? Where's the equality when the only reasons that Barack H. Obama will rise to the pinnacle of temporal power tomorrow are that he's Black and a good speaker (who also happens to borrow thoughts and words from others' speeches)?
