That might be a true statement, although I don't recall, historically, ever something like that happening in slow motion. Perhaps China might be used as an example, but that would require examination. China had various smaller revolutions that changed it from a monarchy to communism.

What Kruschev is saying essentially is that it is possible to turn an apple into an orange a little at a time. One can't infer from that that both are similar.

The fact remains, there are important differences between communism and fascism. What you would need to find in order to support your argument is a historical example where both existed at the same time.