I recall very clearly in 1993 seeing a restaurant on second road with a notice in the window that stated: "No Blacks!" It made me feel very uncomfortable. I thought... London circa 1950s??
I felt uncomfortable because it was a medical team of black nurses and doctors in Wolverhampton that saved my brother - a white senior police officer in the Met - when he was at death's door! They were black and knew that my brother was a police officer within a police force that was condemned by Sir William Macpherson, some years later in 1997, as being 'institutionally racist'. I think Bill (Cluny, now retired and living in Scotland, head of the Macpherson clan in those days) could have added 'homophobic' to his list of shortcomings in 1997!
As the Thais claim to do: seek to judge a person by the warmth of their heart! Now, whether or not the Thais do so on every occasion, it is, nevertheless, how I seek to judge people that I encounter.