The only valid criticism in this article is that the government arrested Marxists for criticizing the labor conditions in China

Marxists arresting other Marxists over tiny doctrinal issues is like the most Marxist thing ever.

I think that the silver lining of this is that they actually think people listen to Marxist academics. I think they are abit over zealous in that regard but the fact that they think people listen to them means that they hold some level of political power, however ephemeral. It means that it must be taken seriously.