Paul Craig Roberts, himself no leftist, nevertheless recognizes the necessity of a vibrant left as a countervailing power; otherwise, capitalism runs amok and destroys everything. But the left has been destroyed by identity politics. Here is how Roberts puts it:
Karl Marx said: “Workers of the world unite; you have nothing to lose but your chains.” Identity Politics says: “Workers of the world disunite, splinter into victim groups and hate white males.”
Identity Politics is the worst enemy the working class has ever had. Capitalist exploitation unifies the working class, but Identity Politics divides the working class.
Identify politics, political correctness, sexist feminism? If I may be allowed to refer back to my unlamented Christian fundamentalist upbringing, these are Satan’s gifts to the ruling class.
Reference: Can the American Left Be Resurrected?