Very interesting and I would not have expected that outcome. In some ways the actions of avowed racists is easier to deal with. If our cards are on the table we can at least have a discussion. The racism that dwells in people and institutions who never admit it is incredibly corrosive.
Reading historical texts about eras where the concept of race didn’t exist as we know it today is refreshing. I suppose they had other problems but the modern conception of race feels like a political tool and completely artificial. So too with gender, it’s encouraging to see kids abandoning those outdated notions.
Personally I would do this but it depends how well you get along with them. Obviously the last thing you want is arguments and sulking. Having your own space to retreat to would be the thing to negotiate ahead of time.