It must have been hell for the average citizen to live under Nazi tyranny.
... depends on what you see as the "average citizen". Too many were glad to have the new power and "progressive" politics to be proud of after the Versailles treaty.
The problem is that Germans seem (seemed?) to like the extremes. The worst of the fascist or autocratic regimes (compared to Mussolini, Franco, Pilsudski or others) and from 1953 to 1989 a country that was more communist than the USSR (the GDR). It is hard to find a level of "normal" patriotism as the leftists will call it nationalism and the rightists will claim it as a part of their ideology. There is no "normal" right-of-center political party here. Everything that is right of the conservatives is extremist. That is a problem.
Mamav, until the late seventies lots of Germans considered the time from 1933-1938 the luckiest of their lives. The great depression of the 20s had ended. Many were Teenagers during that time and could hide all the problems of the adolescent age behind a Hitler-Youth uniform. They could stick together and feel important (... give someone unimportant a nice uniform and watch the effect..)- this was it what lots of them remembered I think. They learned to be good Nazis as a kind of side-effect in their eyes. That was the "bright" side of the medal.
Three years ago while I was studying history in Bayreuth I worked in the archives of a "Hilfsschule" (do not know the English word - a school for hard to educate and handicapped pupils) and found out that many teachers made "intelligence-tests" with their pupils from 1934 on. They recommended them for sterilisation when they were 12 years, some of the pupils were later murderd in the "euthanasia-programme". This was not well known in Bayreuth at the time when I found it out and not everyone wanted to know. These children did not have the bright childhood memories like many of the others... not to mention the millions that died during the holocaust. This was it what we were liberated from.
Still too many Nazis here (even one is too many). The old ones die out but the new ones are a problem (they are not many but they make the headlines). Most of them are quite stupid and do know nothing about history, they are "proud to be German" because they have nothing else to be proud of, are jobless or wanted to join a "cool" group of skinheads. :barf: - But this does not make any difference for their victims, often asylum seekers, people of different colour or handicapped.
D-Day was the beginning of a better time for Europe - and Germany belongs to Europe, no doubt.
Sorry, long post
Andreas