Nonsense. Factory farming is an innovation created by capitalists maximizing their profits, not some communist conspiracy. The communist idea was for the state to control agriculture by using laborers with no interest in the land they were working. It really has nothing to do with factory farming where capitalists try to squeeze more profits out of their privately owned land.
Think again, and think about it very closely. Who is the biggest supporter of factory farming in the USA? I don’t see the left dismantling it; they subsidize the blazes out of it, rather.
Why would the beginnings of factory farming be in the Communist Manifesto, in black and white? It’s part of the record.