Yes, that's a great tweet.
Maybe I have an under-developed sense of sympathy, but I have trouble working up much pity for the self-deluded, even in cases like Trump University. Confidence tricks tend to target not just gullible people, but greedy, dishonest gullible people -- people looking to get away with something. They get what they deserve.
For example, consider the people caught up in pyramid schemes because they imagined it would be someone else at the end of the day left with no greater fools to recruit. Or consider the classic Nigerian prince scam, where people are convinced to front money to fund an operation that they imagine will help a foreign dignitary skirt local law to move a huge sum of money out of his country (with part of it becoming their windfall). Who falls for that? It's not just a dumb person. It's a very specific kind of dumb person. It's a greedy, unethical dummy who gets seduced by the idea of getting a share of unearned wealth for taking part in shady dealings.
I get come-ons like that in my email frequently, and they're almost always built around an appeal to bad character traits. They aren't trying to suck me in with compassion. They're trying to trick me into thinking I can get rich by doing something shifty -- for example, they pretend to think I'm the heir to a fortune that there's no way I'd imagine I was actually the heir to, and the whole grift is designed to shut down my BS detector by making me think I'm the one taking advantage of them, rather than vice versa.
I'm not saying ALL confidence tricks are based on appealing to greed, or vanity, or other negative traits. Some prey on the desperate, some on the gullibly compassionate. But usually the con men pick their marks based on character flaws, since people are least cautious when they're thinking of themselves as predator instead of prey. That was definitely Trump's M.O.
Trump University appealed to the greedy -- people who thought they'd learn the secret short-cut to riches by flipping properties and otherwise gaming the system the way Trump did. The Trump campaign appealed to the lowest features of human nature, too. He picked his marks based on their greed, their vanity, and their hate. And so when he then exploits those who were horrible enough to vote for him, I have no sympathy. I would feel bad if they were merely stupid, but they were stupid and evil, and so they deserve what they get. There are enough innocent victims that I don't need to waste my sympathy on self-selected ones.