you had a military dictatorship. it couldn't be opposed or contested by anyone, because you and/or your family would just be killed.
german citizens couldn't stop the killing any more than russians could stop millions from being killed.
that was the fundamental problem. dictators do as they please. criminalizing the speech of random bob under a democratic government isn't doing much of anything, and these laws mean nothing to a dictator.
what actually matters is having a democratic government that is beholden to the citizenry. if anything this speech criminalization is a theater of sorts that makes you less safe.