"How Democracies Die" goes into quite a bit of detail about this -- basically, it is impossible to run a system purely by making the right laws, because the system is made of people. The laws can say whatever you want. If the people start to betray them, the system will fold.
In practice (so says the book) every single democratic government depends on a structure of norms, and violation of norms and laws goes hand in hand to form the eventual collapse into fascism when it happens.
They also say that resistance from the establishment conservatives (that the fascists are trying to invade and co-opt from within) is generally the key factor that can prevent a fascist takeover. Which is pretty fuckin worrying when you look at the modern Republicans.
Dude
Forget 2 divisions, are we gonna forget about the whole Ribbentrop thing entirely, or what