Saying the NSDAP was democratically elected to power is a perpetuating a fascist lie. The NSDAP was always using undemocratic methods, such as political violence and voter intimidation, and finally, outright banning and persecuting political opponents and entire political parties. That is not being elected more or less democratically.
If you have been taught bad history, then enlighten yourself, rather than continuing to give fascists false legitimacy.