That's what is so incredibly sad. We have the advantage of history and yet it didn't change a thing.
Here are some salient points from an essay titled "But Then It Was Too Late":
What happened here was the gradual habituation of the people, little by little, to being governed by surprise; to receiving decisions deliberated in secret; to believing that the situation was so complicated that the government had to act on information which the people could not understand, or so dangerous that, even if he people could understand it, it could not be released because of national security. And their sense of identification with Hitler, their trust in him, made it easier to widen this gap and reassured those who would otherwise have worried about it.
"This separation of government from people, this widening of the gap, took place so gradually and so insensibly, each step disguised (perhaps not even intentionally) as a temporary emergency measure or associated with true patriotic allegiance or with real social purposes. And all the crises and reforms (real reforms, too) so occupied the people that they did not see the slow motion underneath, of the whole process of government growing remoter and remoter.
...
Nazism gave us some dreadful, fundamental things to think about - we were decent people - and kept us so busy with continuous changes and "crises" and so fascinated, yes, fascinated, by the machinations of the "national enemies", without and within, that we had no time to think about these dreadful things that were growing, little by little, all around us. Unconsciously, I suppose, we were grateful. Who wants to think?
"To live in this process is absolutely not to be able to notice it - please try to believe me - unless one has a much greater degree of political awareness, acuity, than most of us had ever had occasion to develop. Each step was so small, so inconsequential, so well explained or, on occasion, "regretted," that, unless one were detached from the whole process from the beginning, unless one understood what the whole thing was in principle, what all these "little measures" that no "patriotic German" could resent must some day lead to, one no more saw it developing from day to day than a farmer in his field sees the corn growing. One day it is over his head.
...
Each act, each occasion, is worse than the last, but only a little worse. You wait for the next and the next. You wait for the one great shocking occasion, thinking that others, when such a shock comes, will join with you in resisting somehow. You don't want to act, or even to talk, alone; you don't want to "go out of your way to make trouble." Why not? - Well, you are not in the habit of doing it. And it is not just fear, fear of standing alone, that restrains you; it is also genuine uncertainty.
...
"Uncertainty is a very important factor, and, instead of decreasing as time goes on, it grows. Outside, in the streets, in the general community, "everyone is happy. One hears no protest, and certainly sees none. You know, in France or Italy there will be slogans against the government painted on walls and fences; in Germany, outside the great cities, perhaps, there is not even this. In the university community, in your own community, you speak privately to you colleagues, some of whom certainly feel as you do; but what do they say? They say, "It's not so bad" or "You're seeing things" or "You're an alarmist."
"And you are an alarmist. You are saying that this must lead to this, and you can't prove it. These are the beginnings, yes; but how do you know for sure when you don't know the end, and how do you know, or even surmise, the end? On the one hand, your enemies, the law, the regime, the Party, intimidate you. On the other, your colleagues pooh-pooh you as pessimistic or even neurotic. You are left with your close friends, who are, naturally, people who have always thought as you have.
"But your friends are fewer now. Some have drifted off somewhere or submerged themselves in their work. You no longer see as many as you did at meetings or gatherings. Informal groups become smaller; attendance drops off in little organizations, and the organizations themselves wither. Now, in small gatherings of your oldest friends, you feel that you are talking to yourselves, that you are isolated from the reality of things. This weakens your confidence still further and serves as a further deterrent to – to what? It is clearer all the time that, if you are going to do anything, you must make an occasion to do it, and then you are obviously a troublemaker. So you wait, and you wait.
"But the one great shocking occasion, when tens or hundreds or thousands will join with you, never comes. That's the difficulty. If the last and worst act of the whole regime had come immediately after the first and the smallest, thousands, yes, millions would have been sufficiently shocked – if, let us say, the gassing of the Jews in "43" had come immediately after the "German Firm" stickers on the windows of non-Jewish shops in "33". But of course this isn't the way it happens. In between come all the hundreds of little steps, some of them imperceptible, each of them preparing you not to be shocked by the next. Step C is not so much worse than Step B, and, if you did not make a stand at Step B, why should you at Step C? And so on to Step D.
"And one day, too late, your principles, if you were ever sensible of them, all rush in upon you. The burden of self deception has grown too heavy, and some minor incident, in my case my little boy, hardly more than a baby, saying "Jew swine," collapses it all at once, and you see that everything, everything, has changed and changed completely under your nose. The world you live in – your nation, your people – is not the world you were in at all. The forms are all there, all untouched, all reassuring, the houses, the shops, the jobs, the mealtimes, the visits, the concerts, the cinema, the holidays. But the spirit, which you never noticed because you made the lifelong mistake of identifying it with the forms, is changed. Now you live in a world of hate and fear, and the people who hate and fear do not even know it themselves; when everyone is transformed, no one is transformed. Now you live in a system which rules without responsibility even to God.The system itself could not have intended this in the beginning, but in order to sustain itself it was compelled to go all the way.