Is that a moral issue, or one of knowledge / technologies?
You can only go on the best information you have, and many theistic beliefs are currently acceptable in the modern world despite being no less plausible than a belief in witches.
More basically: if your morality means decisions to justify or reject the torture and killing of another person, then you'd better set some damn high criteria for whether your information is complete enough.
Even medieval humans understood a surprising amount of this. A Book I highly recommend that demonstrates as much: "The Faithful executioner: Life and death, Honor and Shame in the turbulent 16th century" by Joel F. Harrington. It records a lifetime of personal observations through diary entries from a public executioner in the Germanic city of Bamburg during these times. and gives wonderful insights into how well even those charged with the job of killing could reason about the dirty ambiguity of what they were doing.
It’s easy to dispel any argument by hand waving and saying “but look at all these other problems therefore you’re wrong!”
I stand by the assertion that 60/70 years ago western society had a more unified sense of what is right and wrong.
No doubt there were some major missing elements of that but the point stands.
If anything, a case like Assange's just 60 years ago would have much more easily been condemned as simple treason and with wide U.S public approval of either a long prison sentence or the death penalty, on the grounds of then much more prevalent and simplistic "patriotic" sentiments in society. Today, there's far more divergent debate on this that is exactly why so many across internet and media defend his actions despite this despicable rigidness from the court.
That would be 1950-1960. Speaking of America, Montgomery bus boycott started in 1955. Which took a year and started whole civil war movement. President Nixon’s red-baiting campaigns were at exactly that time too.
In Europe, IRA started their border campaign in 1956.
And that is just me going from top of head.
70 years ago was just after Europe decided to murder millions of Jews, Roma, Gays and a bunch of other groups.
People go by what they gathered from movies and what their older relatives talk about.
And somehow today its feels that everyone thinking that the European Union was formed on Tuesday following the pyramids and its been the bastion of human rights and civilization since.
I'd agree that 60/70 years ago Western countries certainly thought they were right and other people were wrong.
What? And there was more of such a compass a century ago when lynchings were much more common for "racial defilements"? Or two centuries ago when slaves were considered bad by the general public for escaping from the brutality of ownership? Or perhaps 600 years ago when witch burning was remarkably common in much of Europe?
Not criticizing your defense of Assange (his treatment really is deplorable, petty and cruel), but This phrase has never been anything less than absurd, and particularly so is to claim it of today's society in comparison to some mythical past morality..