Hang on a second here: many people comment that murderers seem like really nice people when they met them briefly. You don't really know anything about someone

Hang on a second here: many people comment that murderers seem like really nice people when they met them briefly. You don't really know anything about someone just because you met him for a bit a few years ago. He can be both unprofessional and seem like a calm and nice person, while being neither if you had gotten to know him better. You comment that he's made just one mistake on a bad day. Perhaps this is just his most visible mistake, and he's been making these kinds of bad mistakes for the past month. It didn't take him 10 seconds to do this - he had to log in with full access to the reddit database and run unprotected queries against the live running copy. That's both shocking security, operations and basic common practice. For a childish insult. And finally, he did not actually apologize for any of this. "I fucked up" is not the same as "I'm sorry".