Now for an alternative thought exercise consider the situation in which a democracy votes to end itself and initiate a dictatorship. Is it democratic or anti-democratic to try to stop it?
Although the end of the Weimar Republic was essentially an electoral choice, significant chunks of the electorate by then had been skewed, divided, disenfranchised, or even displaced it wouldn't be accurate to call the elections fully representative. And yes, similar efforts are underway in the US too.