The way I read it, the first part of the sentence you quoted shows admiration, followed by a “but [… ] her masterful code-switch” (emphasis mine) which implies the code-switch was less than admirable, possibly even the opposite of it.
The “masterful” adjective doesn’t necessarily imply admiration, as it could be implying she’s really good at something the author thinks is nefarious. I say this because code-switching, if you believe Wikipedia, is sometimes seen as a negative thing:
Such shifts, when performed by public figures such as politicians, are sometimes criticized as signaling inauthenticity or insincerity.
So hopefully this explains why I interpreted the post that way. I could be completely wrong, of course, but since the implied nefariousness (or not) wasn’t even the main point of my comment, I think further discussion of that point is moot.
