People from the left side of things don't like the President calling them out.  That's all.  President Trump just uses twitter to get his opinion out as the media has just gotten over the top against anyone that doesn't agree with their far left liberal agenda.  Every article (really editorial) about Trump in this paper starts with a derogatory headline, then right off gives a negative paragraph about why Trump is wrong, in their opinion, which they always stated as fact.
This article is a case in point.