Capitalism specifically means: an economy oriented around private ownership of the means of production. There is a world of implication from that simple statement.
Fascism is what happens when workers get too "uppity" and the upper classes decide it's better to let a strong man reign in the lower class via a combination of spectacular appeals, mythology, militarism, crackdowns, and external expansion. Working conditions in Nazi germany were terrible because they destroyed labor unions. Fascism to a great extent is operationalized anti-communism.
Communists like myself also value the freedom of the individual, but we value the freedom of all individuals and want to make it real, not a thing you just say and then shit on a homeless person or abuse an employee.
Freedom of the individual is not compatible with communism. You can value some freedoms but all right to property is lost - something I value. (I don't allow freedom to murder - but I still value freedom more than communism can)
fascism is not an ecconomic system, and very much can be communist - though of course none of who we think of as fascist were communists.