One big problem with judging people by their mistakes is that what you are actually doing is judging people by the mistakes you are aware of. The people you have judged to be angels might simply be better, or luckier, at getting away with their transgressions against humanity. That would result in an inaccurate ranking of human beings on your personal judgment scale. There’s no point in being a judgmental person if you can’t accurately rank people. That’s just guessing.
