The not explicitly expressed thought behind my comment was that in my interactions with people of different races and cultures I can be biases free. But, some groups have obsessive tendencies of interpreting as prejudices otherwise neutral words or actions. Jews and Blacks come to mind. One can understand this because in the sphere of the western civilization they suffered a lot. Despite that sins of our ancestors are not on our conscience, we have to be aware that subconsciously we might carry on some biases.
But, we have to ask ourselves as well, at which point we start treating Jews and Black the same way we treat those who are exactly as we are. When Israel came to existence someone wisely said that it would become a normal country when they would have their own thieves and prostitutes. Now they do, but still any critical voice about what Israel does, especially if it points at actually bad things, is quickly labeled as antisemitism.
Similarly, just recently I needed to fire a few of young Black workers, who had no skills, no readiness to learn and no willingness to follow orders, but they felt entitled to a special treatment just because their ancestors, five or six generation back had been slaves. I had a job that needed to be done. They had their preconceived notions about racial relationships in the United States, but could not perform basic tasks as instructed. Biases you write about are on both sides.