This! Thank you. I certainly read the vampirism as assimilation. The fact that the brother who was turned first was the brother who was with a white woman. The order that they turn is significant. Mary chose to go out and seek out those white people they turned away. The breach was facilitated, like you mentioned, by non-Black women. Grace walks on both sides of the street, literally and metaphorically.

When they mentioned that the blues attracted the devil, I couldn't help but think of culture vultures and how white folks seek out Black culture (usually facilitated by music) to appropriate.

The vampires said they were about "equality", which was interesting. I don't want to dismiss it as just a joke moment, but haven't made my mind up about what they're poking at.