That sums up the whole intro, exaggerating and parodying things to the max. I agree that it's not the best way to make the game 'appealing to everyone' right from the start.
I don't know if you played v0.2 (especially the dialogue between Veronica and her mother in the church or the dialogue between Veronica and Sarah in Luigi's room) but it's partly explained :
Some of these things are not yet explained in the game, but they will be.
Once again, it's the deliberate exaggeration of the intro that brings the whole thing to a climax, before dropping back down after Veronica's death. Afterwards, we'll learn that the baby is just like any other baby, that the black people who do scenes with Sarah do so because they're just paid for it, it's only role-playing during the scenes, outside they're just like everyone else, ditto for Sarah, she's not a QoS as it might seem, she's just doing this kind of content because she's better paid than for other fetishes.
As for the racism Lorenzo may express, I'd call it clumsy racism. It sounds strange, but he's not really a racist, he's just worried and frustrated about Sarah. And unfortunately, the way he expresses it is racist. The way to "fight" this will be part of the plot, so it's essential.
I think my mistake is clearly not to have put a disclaimer directly at the beginning of the game concerning this subject, the poll seems to confirm it. I'll fix it for v0.3, since it's easy to avoid much of this content by not making the “corrupt” choices in the intro.