We pretty much are. And a lot of this weird ahistorical 'contrarian' message board stuff about slavery might not seem like marching with torches but it tends to originate from the same places - as a way to rationalize and recruit for the ideology of the marchers. It's a sell job, not some clear-eyed, unflinching take on history as the people who tend to repeat this stuff often appear to think.
The history of slavery spans many cultures, nationalities, and religions from ancient times to the present day. However the social, economic, and legal positions of slaves were vastly different in different systems of slavery in different times and places.
Slavery can be traced back to the earliest records, such as the Mesopotamian Code of Hammurabi (c. 1860 BC), which refers to it as an established institution, and it was common among ancient people...
Although slavery is no longer legal anywhere in the world (with the exception of penal labour), human trafficking remains an international problem and an estimated 25-40 million people are enslaved today, the majority in Asia.
Slavery is absolutely ubiquitous across both time and cultures.
Instead what I'm seeing is ad-hominem bigoteering that attempts to ascribe bad faith, nefarious motives to someone even bringing up historical facts that can be looked up by anybody with access to the web or a library.
Absolutely, I don't see anybody making the claim that slavery is wonderful, and devoid of suffering and degradation for generations to come. Maybe the folks walking around with tiki torches, but, let's be real. You and I, and most of Hacker News interlocutors are not spending much time around that crowd day-in and day-out, so we can all safely assume nobody is advocating for that here.
The fact however is that slavery has been with us, as a species, for the entirety of our recorded history, and is still alive and well as of today, in one form or another. As horrible as the Atlantic slave trade has been for centuries, we can learn more history, transcend a US-centric, exceptionalist world view, and realize that what we're talking about was not an isolated, special and rare phenomenon, never seen before, or that never happened again since.