One of the main reason thus far as to why communism hasn't been rearing its head to oppose the rising fascism, is because many people still have a living memory on what its like living under the system. I would give it a generation or two before communism becomes vogue again; kinda like how fascism is on the rise again because those who lived under it are gradually fading to tell the story. And the younger generation don't have the first hand knowledge and experience to actively avoid it.