It not just Hitler. All would-be tyrants know that democracy is a stepping stone toward Totalitarianism.
For this reason, the word ‘democracy’ was considered a dirty word by the Founding Fathers, a word found nowhere in any of the founding documents.
I believe it was Marx or Lenin who said something to the effect of:
The first step in getting free people to give up their rights and accept being ruled, is to install a Democracy, whereby they are ruled by the majority.
By accepting majority rule, they signal a willingness to be ruled over, and it makes little difference who rules them.
The Democrats understand this - it’s why they chose their party’s name. It’s why they are constantly referring to “our democracy”.
Democratic governance is the anti-thesis to the Rule of Law.