reminder, if you will, that likeability and charm (and talent) aren't proof of kindness and someone worthy of respect and worthy of your trust.
This is definitely true. But I might take another lesson from this as well. Real people have both good and bad. Somebody you like, somebody you really respect, is likely to have something about them that you don't like. If you're lucky, it's smoething minor. There's not a small chance, however, that it's something major. And, on the flip side, somebody who has something about him you really don't like might also have some redeeming qualities. Isaac Newton, evidently, was an utter arrogant jerk, the kind of person that is all over academia and that sometimes I think is one of the biggest problems with academia. Yet, he was also brilliant, and gave the world tremendous things, and we shouldn't stop celebrating him because he was also a jerk.
("Thomas Jefferson had slaves.")
People are complicated. With current people, you can hope to change their behavior. With historical figures, we should continue to respect and celebrate their contributions and the great things they did, while being aware that there are probably also things about them we wouldn't like-- and not use the bad things as a reason to write them off as no longer worthy of respect for the good things they did. But we should also remember that they were people, and as such, had flaws, perhaps big ones.