Let me explain to you people lacking a basic education about your own empire and your country's dealings with people in Africa and the Caribbean
-the black man is from West Africa, his family was not subject to slavery, the white woman's gibberish/patronising explanation of his subhuman/black behaviour was offensive and ignorant. no wonder he was so angry.
-the black woman who told her to shut up was offended by this know nothing white woman patronising someone using slavery as an excuse to be rude. she is of Caribbean origin and clearly does not like her family's history/suffering being used as a casual insult.
-the eastern European gobshite is white and so expects that she knows everything about everyone and so gave her ill considered opinion on the man's history
-the eastern European gobshite 'has black friends' so obviously cannot be racist
-the eastern European gobshite was enjoying herself, that is why she continued with her nonsense, she was not intimidated by the massed ranks of horrible lynching blacks.