- Charm: a lot of people don't realize this, but the "con" in "con man" is short for "confidence". They work by abusing and exploiting people's confidence in them. A con man has to have enough charm to get people to place their confidence in him, or the scheme isn't going to work.
- Intelligence: fraud isn't something you can pull off by brute strength. You need a sharp mind to plan a scheme and carry it out.
If a con man wasn't "charming and unbelievable intelligent", I'd doubt his efficacy as a con man.
And I'll also add that "charming and unbelievable intelligent" is a good way to describe a number of serial killers. Charm and intelligence doesn't a good person make.
Yeah, I know this person is technically being charged with being a Russian double agent and committing treason, but he just seems so down to earth, relatable, and smart! Swoon!
"Ah this guy is smart, so he must be a good person!" or "this person is bad, well he must be an idiot!"
I'd argue, this mental shortcut stems from the way we view ourselves:
"I know I'm smart, but I don't know if I'm good, so I'll just set $smartness = $goodness so I no longer have to worry!"