He's a fictional character in a few novels that were turned into movies. You can think whatever you like about him.....he is not real so it doesn't really matter. - BTW, his character is written as a personable and intelligent man who is evil underneath. Serial killers do not advertise. They gain your trust then pounce. That is one reason they are so creepy......it could be the guy next door and you would never know.
Some people think he's not all bad because he seems like a nice guy and only eats bad people. They don't realize that just makes him more dangerous. I don't think I would like to be invited over to his house for dinner. That was pretty creepy when he had Ray Liotta eating soup made from his own brain. Not a "nice guy" in my opinion.