The NSDAP utilized a leftist worker's movement appeal (method) while making good on their promises unlike the Bolsheviks, in order to get into power (goal). That accounted for the bulk of the democratic momentum. Yes, they also added many peripheral items to appeal to the Volkish, to the Catholics, to adjacent fascist allies, and to the remnants of the native constitutional conservative upper class. That accounted for the support from much of the elite behind the democracy. I would say it was quite a bit more complex than your portrayal.
The NSDAP rose to power primarily as an anti-Communist party only a few years after a Communist revolution in .de
They combined the moderate liberal party with the traditional values conservatives and appealed to a defeated, horrified, confused and shamed nation.
Had they stopped there, history would remember them as a miracle.
They tried to take on too many threats, and not enough real ones.
If they had thrown all their effort into crushing the Soviets, and liberating mainland Europe later, there would have been no will to oppose them.
At that point, the USA would have had leadership change and the new administration probably would have given them diplomatic recognition.
Luckily, they did not make it to that point -- the atomic age was instead fought by the two least decisive forms of government, Communism and Democracy.