Fascism is a form of socialism. Socialism is theft of wealth. There are three basic forms:
Communism is government ownership of markets (and companies).
Fascism is government manipulation of markets (companies are left in private ownership, but told when and what to buy, sell, and who they must hire and fire).
Slavery is theft of wealth directly, via 'ownership' of people.
You are correct that fascism is on the road to communism. It is socialism, nevertheless. It is still theft of wealth.
Only capitalism creates wealth. Socialism cannot exist without capitalism, since it must have someone to steal from.
Since socialism is theft of wealth, it can only be implemented by dictatorships and oligarchies (a slave master is a dictator).