Harbouring such ignorance in modern society is unbelievable. Yet there are still people around who foster racism as if it's a badge of honour.

It's also done because the leader of their political persuasion believes it's right to condone that behaviour. We are all entitled to our own beliefs and to manage them accordingly. Your relatives' behaviour is bigotry and I agree, the best course for you is to distance yourself from such unacceptable behaviour.