They threw the Socialist bit overboard early on.
They came to an agreement with Stalin, didn’t mean they liked him or supported his philosophy.
Many of them felt, correctly, if they got into a war with The Soviet Union it’d be suicidal, hence the Molotov-Ribbentrop Pact.
They’d agreed to split Poland between them. Western Poland used to incorporate Prussia for a very long time, Eastern Poland was always predominantly Russian.
Then in 1941 Hitler against all advice from his Generals decided to invade Russia, for living space, resulting in well, a suicidal decision.
Would you agree that the Fascists had a collectivist philosophy and that they wanted a large and powerful central state apparatus so as to exert social and economic control over their territory?