They weren’t their “normal lives”. People were affected by the rule of the nazi party since it very quickly installed a new social order in the country. We shouldn’t think that the move of the country towards violent totalitarianism happened without people noticing.
But just like now, the future wasn’t obvious. If you could have convinced people in 1932 that the nazi party world start WW2, they wouldn’t have voted for it. If you could have convinced them in 1935 that not only will they be anther world war, but their nation would try and almost succeed in exterminating various peoples from their own country, people world have violently rebelled and deposed the nazis, but that wasn’t obvious. It wasn’t obvious even in 1938 - “peace for our time”, eh? So people did grudgingly accepted what was happening while completely misunderstanding the seriousness of the situation.
There is no way around this. It will happen again and again and there is no way to prevent it because this shift from a strong democracy to authoritarianism is so impossible to believe that people will rather go by their preconceptions rather than the evidence in front of them and simply refuse to think something like this can actually happen.
This is why it isn’t reasonable to expect the people to simply take to the streets. We need leadership
since when is war an internal affair?