That's a bit harsh. We're all products of our environments.
Yes it is. Not quite as harsh as owning people, though.
I don't dispute that people do evil things because they are products of their circumstances. I also don't excuse them for doing evil things, regardless of their justifications.
I don't want to belabor this point, but I'm not completely convinced that you or I are completely free of beliefs and actions that won't be viewed as ridiculous, backwards, or just evil through by people 150 years into the future. What if the consensus liberal opinion in the unified socialist nation of EurAmeriChina 150 from today is that capitalism was completely evil - oppressive to the poor, destructive towards the earth - unconscionably and obviously evil. Yet the vast swaths of the middle class simply accepted it, and defended it, fought for it, even though we knew its benefits were heavily tilted towards the rich elite. How do we, as people who meet here every day to glibly discuss how we profit from this system, appear through the lens of time if this system is one day declared as untenable as slavery, serfdom, or all the other systems of economic oppression that have been employed over the years?
Maybe I'm overthinking this, but I'm convinced that you're underthinking it. That is all.