This piece is supposed to highlight the Mammy, and the racism that followed that steryotype. Mammy, although a seemingly harmless and playful term was a psycological hinderance to the African American Community.
#1 - Mammy was considered a happy soul who proudly served mostly white families. Her obidience and servatude was awarded with acceptance by white culture, her "wisdom" and power as a female was mistaken as empowerment even though it still encouraged african americans to find their place serving white families
#2 - Mammy's power was crippling to black males. The large assertive mammy was seen as the leader of a black family. Black men were seen as subserviant and weak. Followers not leaders to the Mammy mother figure. A powerful common conseption which did exist and in some ways still do.
The other messages in the vignette are more obvious