I'm white - no real life experience with non-whites until the late 50's and I was born in '46. Though no real life, I watched Amos and Andy and Beulah. What I learned from them, as they were my only contact with the subject, was: there are people with skin darker than mine, they talk slightly differently than my parents and relatives in(state I was born) but a lot like my relatives in (state we moved to just before I turned 6), some are smarter than others, they are more likely to be helpful, most of them are trustworthy (I refer to those not Kingfish/partners in small cons),they have lives like my family and me.
In other words, with only those shows as data, during the time most likely for it to happen, I had no racist beliefs and a quite positive view - which nothing later changed. I understand in the vaguest possible way the NAACP attitude, but, for me, those shows were very positive!! I firmly agree with that Hazel connection - though Hazel was not one of my favorites and Beulah was.