Incorrect, on all counts. Communist parties derive their power from popular support from the working classes, as they themselves are working class. State violence is used against fascists, sabateurs, capitalists, and landlords. If they truly were a nobility concerned only with oppressing workers, then you have to prove why there was such dramatic improvements in social welfare, poverty eradication, key life metrics, studied Marxism and taught it in universities, and more. Certainly these would have been of no importance to a new ruling class?

You’re dramatically incorrect here.