Apparently something happened at some point, which got the attention of the news media.
It sounds like she is a real piece of work, but it's also clear that nobody's been deprived of a Harry Potter book through her efforts, so I don't see how the public's been harmed.
Gwinnett has had an incredible influx of Hispanic immigrants, most of them illegal. The county used to be mostly white with some black residents (there are historically fewer minorities in N GA) now it is almost majority Hispanic (IIRC - heard this from a friend a few weeks ago who lives there). The illegals don't pay taxes, don't spend money locally (they send almost all of it back to Mexico), live 20 in a house, and are a drain on the county funds.
I imagine ill-feeling against those folks is the reason for the cutting of library funding for Spanish language books . . .