George Orwell nailed it when he wrote:
“Whenever A and B are in opposition to one another, anyone who attacks or criticizes A is accused of aiding and abetting B. And it is often true, objectively and on a short-term analysis, that he is making things easier for B. Therefore say the supporters of A, shut up and don’t criticize: or at least criticize 'constructively,' which means in practice always means favorably." (from "Through a Glass, Rosily")
-B.
Alex Hogan wrote:
"There used to be joke that when any American used to go to the USSR, any criticisms of their human rights policy was met with "well about your negro." There is a point to that, but it dosen't mean you have to pretend the gulag was progressive either. Those kind of politics are old as dirt of course, which is why is so maddening to realize every generation of the left ends up having the same arguments."