I would classify that as "organic" criticism.
To put another way: are people on twitter criticizing him because they don't like his articles, or because other people on twitter have said that you shouldn't like his articles?
To put another way: are people on twitter criticizing him because they don't like his articles, or because other people on twitter have said that you shouldn't like his articles?
(Note: I don't follow him... not super familiar, but this seems like a weird either/or)