Ok, I'm going to try to address this since someone asked nicely...
Episode 6 didn't have Merrick tell them that it may not be Claudia, or that something may be with her, because that's the gag. Claudia is also speaking for the writers/showrunners.
I've already said why this episode and the other racist comments sprinkled throughout the season are about the unmaking of Louis, and Claudia. But Louis is a larger target and I have my theory as to why.
Episode 6 is also about the conversations that this chronically online writers room have no doubt seen saying that making Louis Black was an improvement.
And they don't like that, or the audience that came with that change, regardless of the benefit to the show it brought them.
Merrick calls on "the son of Ham" summoning Claudia - this has nothing to do with any spiritual practices other than the use of Ham and his offspring to justify chattel slavery.
Claudia says "there's something etched on your rib that says slave." People have pointed out that this is a reference to Adam and Eve and they're correct! In this case, "the first man Adam" is "the first vampire Louis". The white one. The one who owned slaves. That this new incarnation is nothing but a slave taken from the bones of the original.
They're saying that the slave owner was rejected, so enjoy your slave. A nappy headed pimp of a slave. Point blank. Period. I mean, we all heard these things.
"Oh, but that's what Claudia says in the book!"
Yes, sweetheart. I know. Now go be a pleasure to have in someone else's classroom.
This is also why Claudia glazes Lestat’s blood being hers after not wanting it for Madeleine. Why she talks about her "bleak, Black life".
The offense of enjoying these Black iterations of Louis and Claudia was something they couldn't let go.
(This is rushed, but I'm sure you can parse what I'm saying)