This is the explanation:
However, Chinese netizens’ fierce attacks against the ‘white left’ seem curiously devoid of experiential motivation, since all these problems that conservatives in the west are concerned about – immigration, multiculturalism, minority rights, and affirmative actions – are largely unknown to Chinese society.
I don't buy the affirmative action argument because Chinese (and other high-achieving Asians) in America dislike it, but it doesn't turn them right-wing.
Anti-Muslim policies of the government probably moved them in a reactionary direction. Anti-Muslim sentiment is on the rise in China. We found that the Internet fuels — and fights — this.
I suspect the migrant crisis was the red pill for China. Everything else was in play long ago, but nothing sparked a reaction like the one currently forming.
Once China realizes this can be useful in geopolitics, as it was for Russia, we'll be getting gold pandas to stack next to our commemorative Putin gold coins.
Consider the term "Manchurian blogger" officially coined.