The Black and White Minstrel Show

The Black and White Minstrel show was shown at prime time on the BBC from the mid sixties onwards. It was a song and dance show that predominately had white men wearing black make up and dressed like kentucky minstrels. Eventually this got banned because of connections to the slave trade and the fact it was white people, mainly welsh, doing the singing and dancing. I remember my mother used to enjoy watching this. We lived more in an age of innocence in those days before the politically correct brigade had got hold of everything. When I asked my mother why she enjoyed it she said she liked the music and dancing. Who actually takes offence to this and why ?