Nancy Pelosi praising the life of Senator Robert C Byrd

Gen Z may not be aware of who senator Robert c Byrd was. He was a member of the KKK.
Senator Robert C Byrd held the rank of Grand Cyclops. SO if someone whom was a open racist is not a good person then why did democrats sing the praises of this man? Many assumptions could be made of this.
According to leftist anyone like this is to be canceled. So why did Nancy Pelosi praise a man like this. To even suggest a man like this would be apart of American history is telling of what the democrat party supports..