Years ago before WWII we lived in a very ethnic diverse neighborhood. The children all had their own call out for the different nationalities and no doubt were influenced by parents talk. My brother and I being of Russian parents were often referred to as Bolsheviks. There were names for Jews, for Portuguese, especially for Germans, for Africans, for Italians, for Pollocks, for Mexicans. The most frequent for Scandinavians was ‘dumb’. As I recall the children didn’t think about the nicknames. When the time came we all went to WWII with good memories of our childhood activities without regret or rancor.
I grew up with two whites and two blacks as a group of friends. We couldn’t care less about race but the parents were each racist in their own way. One black set of parents were Black Panthers, in the military. Go figure. We never gave a second thought to racism. We were kids growing up and having a good time.