Edited to replace original incorrect Herzog attribution with my own version that correctly attributes the quote
None of what you describe is necessarily mutually exclusive. You can be broken, misled, misinformed, and stupid, while still being good at heart.
Yes, but the issue is that they're broken, misled, misinformed, stupid, AND malicious.
I think that everyone is blind to something. Some of us are less so than others. Growing up in this world will do that to a person. Shit happens to everybody. Some of us are better equipped than others to handle it, while others are not.
I would ascribe that intermittent blindness more to the other ~80% of the population.