It is absolutely amazing how thick you are.
Of course, mass radio and propaganda helped the Nazi state operate.
But they were only broadcasting on the radio after they had power in 1933. It only helped them amplify their hold after they already had total control of the government, in 1933.
But you know what actually helped the Nazi state form? Banning the NSDAP from 1923-1925. And in 1927, banning Hitler from public speaking. And in the period from 1925 to 1932, using armed fighting squads to try to de-platform him in bars precipitating the existence of the Sturmabteilung (SA). And yes, using radio as a political fulcrum to turn people away from opposition parties.
In 1933, Hitler walked the road paved for him by people like you. First as the farce of Weimar, then as the tragedy of National Socialism. Every action had a precendent. Every action justified first by a moral panic. Moral panic by people that can conceive of no reason not to use their over-weaning self-righteousness as a lever to tell other people what to do, without considering the long-term consequences of such actions, without context, without understanding, blindly obeying emotions generated by other people.
Because clearly, in retrospect, the Crusders' blind self-righteousness was morally wrong and led to horrors, the Inquisition's blind self-righteousness was morally wrong and led to horrors, the Commonwealth's blind self-righteousness was morally wrong and led to horrors, the Bolshevik's blind self-righteousness was morally wrong and led to horrors, the Nazi's blind self-righteousness was morally wrong and led to horrors, and countless other movements unnamed. But your sense of moral self-righteousness is morally right and justified and will lead only to utopia and the land of milk and honey.
How beauteous mankind is! O brave new world, that has such people in 't!