Although I don’t agree with some of antifa’s methods, or some of their ideals like support for communism and anarchy, I think white supremacy is a much worse thing to be supportive of.
Also, fascism and communism are definitely not the same thing. I can see where you’re coming from because they both include centralized authority and reject individual liberties. They are still on completely opposite sides of the spectrum though, which on a way makes them so opposite from each other that they seem similar