A Difficult one. My father-in-law (now deceased) was a racist and a bigot and no amount of reasoned argument, quiet discussion or downright quarrelling could make him change his views. Maybe it was because he was from a previous generation when Britain still had colonies. Thankfully his son sees things differently! I'm afraid I can't really offer any constructive advice, but it would be a pity to lose an otherwise good friendship because of a difference of opinion. Peopple do have differing views on all sorts of things from abortion, religion, death penalty and so on. Racism is just another opinion, albeit (in our view) a wrong one