Serenity: A Question

[butterfly]

Okay, how is the Operative like Jubal Early? I do not get it. To me, they seemed like completely, utterly different characters.

Jubal was a bounty hunter who was clearly nuts and who liked causing pain and threatening people, the Operative was an assassin who was very rational and straight-forward. And Jubal didn't Believe in much of anything (is it still River's room if River isn't in it?), much less a better world. And the Operative was exceedingly polite and open-minded, even while killing people (Young miss?). I can't picture the Operative threatening to rape Kaylee. And Jubal tried to deny to himself that he was a monster, tried to claim that it was just his job, whereas the Operative was just doing his job and was aware that that choice did make him a monster.

Seriously, I just really want someone to explain to me how they're alike.