I've read different angles on Todd's character and if you imagine he was raised by his Uncle Jack and hung around those neo-nazis his whole life, then he's probably a victim of his environment as much as an innately terrible person.

Todd did come across as a soft-spoken guy, and he showed respect to Mr. White at times. It demonstrates his mentality of being someone who follows leaders and does whatever they ask or he thinks will make them happy. I hate people like that, but it does explain it a bit better than just writing them off as psychopaths.