I did not read into his post that he had overwhelmingly positive experiences. I’d gather he had good and bad with all races.
I had some very, very bad experiences in high school with black girls. For awhile it did negatively affect my perceptions. However, in the working world I able to realize my perceptions should not be globalized. People are people. Some are good. Some are bad. They come in all shapes, sizes and skin color.
If I am walking down a street and I see someone slinking around in a hoodie with their pants around their ankles, I’m going to to go the other side of the street. Don’t care what color they are, that is just potential trouble I want’ to avoid.
However, if you have had overwhelmingly negative experiences, I can certainly understand where you are coming from.