In 1933 when Hitler came to power, Germany didn't have death camps or the Nuremberg Laws - both came later when the dictatorship was established.
However, repellent anyone finds a comparison between Johnson and Hitler, Franco might actually be a better comparison, but there is little choice in rotten apples, none of the dictators of the 20th century started out, outwardly at least, as the atrocious people they finished up as, but all started by taken liberties with democracy, which both Johnson and Trump are also doing.
Probably, Nazi Germany never would have become the atrocious chapter in world history that it did, if right-minded German men and women ( the majority of the population, in other words) had realised in 1933 how dangerous Hitler would become.
It is at the beginning that there is a chance of stopping a dictator. Later on, it will be too late.