Casual Yes.
I had to spend a good minute looking for something TF2 related to prove to myself this wasn't one giant copypasta. Fun to read, though.
I mean, it's a concept that's usually boiled down to a simple phrase that no one ever really thinks about: everyone is a person. But people are flawed, real individuals, made of matter and molecules, and sometimes we really are just not capable of thinking in ways that most others would consider human. People like the Kims have differences in how their brains work, making them incapable of empathy. Whether that's because of genetics, or being raised to think that the suffering of others is normal or good, we don't know yet. But no one with that much power, who despite that power buys himself luxury cars and postures at the entire globe with nuclear missiles, while millions of people starve... I have trouble believing someone like that is even capable of having their mind changed about what they're doing. There's something physically different about how that brain functions. I'm not arguing that he doesn't have his own thoughts, his own routine, his own way of being a human being, but he's missing empathy; he's missing a huge part of what most of the rest of us have in common. It's more than a failure to see it. He's incapable of understanding that what he sees of everyone else is just a fraction of what they really are. Everyone's a person, but I don't think that means as much as your thing implies.
I don't think personas are as easily separable from the person as you imply. It's easier to portray someone you can easily empathize with. They're like stereotypes, in that they usually exist for a reason. Some people think that all blacks are criminals, and obviously this isn't true. But what is indisputably true is that a higher proportion of crimes committed in the US are by black people. And there are of course other factors at stake here; being given fewer opportunities to succeed in the economy, and that resulting lower economic class being surrounded by a culture that glorifies violence and crime. Jews gained a reputation for money grubbing since the religion promotes education and literacy; and as a result a large proportion of bankers were Jews at a time when education was difficult for the general populace to come by. So maybe when someone sees a lot of success and fame, people telling him he's great all the time, it becomes easier to portray a whiny egotistical asshole. It's not that person's whole self, but in all likelihood it represents a central part of that person's personality. As I see it, gossip and star worship centers around guessing at how much of the persona is the actual person.