He’s perturbed by the idea of interracial relationships and side-eyes Black people whose hair isn’t nappy enough. (Ironically, he makes these comments to his daughter, who’s portrayed by a light-skinned, biracial woman, despite having two dark-skinned Black parents in the film).

I saw that scene in the movie and thought that it was "the joke" that he was complaining about light-skinned black people in the cafe in front of the light skinned daughter. I didn't really put 2 and 2 together about her being obviously not their daughter.