Burning crosses and Amazing Grace

I saw the strangest thing on an A&E documentary about the Ku Klux Klan. Here was a group of white men, women, and children singing Amazing Grace in front of a burning cross somewhere at some ungodly hour in the middle of nowhere. Here is the ironic thing about that. Besides the obvious irony of using a cross as a symbol of hate (they say that the burning cross represents the light of Jesus Christ coming into the world), the song, Amazing Grace, was written by an ex-slave owner who became a fervent abolitionist during his life time. I guess being uneducated should be added to the list of their many flaws.