Fact is, as human beings it is in our nature to never be fully satisfied with any situation. It's kinda like being surrounded by people you don't like and you wanting a change. Then when you get the change you want and are surrounded by different people whom you still don't like you think "Oh the people before this were wayy better."
now here's my question: why name this thread "dangerous nostalgia"?
I think that people who haven't lived during those time periods have a romanticized view because the only way they've seen these time periods is via television and movies from that era. 60 years ago movies and television made everything seem positive and innocent so things such the stolen generation and marital rape were just treated as nonexistent. I think this was probably due to censorship and something called the Hays Code when it came to television and radio at the time. If you actually did live in that era I think weather or not you would want to return to such a time period may not be because of the time period in itself, but the idea of wanting to return to a simpler period of one's own life when one was younger and had a fresher perspective on things, and also because maybe some of the bad things you stated may not have been experienced by them. This maybe especially the case if one had a positive time back then. If one did not have a positive time than they would not want to return to such a time period.
In short if they associate the time period with a positive time in their lives than they would want to go back, if not than chances are they wouldn't.
I'm thinking, a lot of them are white men, living wealthy secure lives, thinking that none of the badness will ever happen to them. Also denial. It's no fun admitting that your father was abusive towards your mother, and that she was miserable all the time. No fun at all. (And to those less smart than MD: abuse is more than just marital rape. He'll, I think society in the fifties and earlier was abusive towards women.)
I agree with this post on a general basis, nostalgia for another time is indeed often an illusion. The good old time were not that good.
Albeit, intriguingly to me, you are arguing things are not different over time, but different over geography. I think things were neither different over time or geography. And individuals are pretty much the same everywhere you go.