Anyhow, Franco was a fascist trash and allied with Hitler and Mussolini. Revolutionaries were mainly anarchists (NOT communists). In fact it's because of Stalin and the communists following him starting an infighting with the anarchists led to the fascist victory.
If the revolutionaries have won, Spain would have been an experimental socialist/anarchist republic. We don't know if ot would have been ended up like USSR. Maybe.
In 1968 though the flight was pretty much about fascism vs democracy.
Oh, last point: Torture is torture.