I think we disagree that racism is learned. I believe it's innate in human nature. Being friendly with all races is distinct from racial preference. We all prefer our own race. We can accept other races and be friendly toward other races. As you pointed out, different races exhibit different behaviors and we respond accordingly. I grew up where blacks were tolerated but were treated differently. I only realized later in life they behaved like they did because of their lack of abstract thinking. Noone explained this to me, i had to discover this on my own. Realizing that not all blacks behave badly and then being able to judge individuals rather than whole races is yet another skill.