Only a narcissist sees anyone who bullies them as a sociopath, because they assume that no sane person could find grievous fault with them.
Ah, codswallop. I would never "assume no sane person could find grievous fault with me", but if I became bullied by a domineering and manipulative pathological liar with no apparent empathy, I would say that person has sociopathic tendencies, and I'd likely be right to say it. I'd also seek a second opinion from someone I considered to have good judgment, as a check on my bias. Then I would commence Operation Eat Me And Fuck Off. For the record, I don't think Goldtop was a sociopath.
In reality, most bullies are just normal people who have a very different idea of what is appropriate, and attempt to rectify what they see as errors in your behavior. The amount of 'bullies' that someone has is usually commensurate to the amount of character flaws that they put on display, and their hysterical refusal to correct any of them just attracts more bullies, like moths to a flame. Far from being 'sociopathic', bullying in any social economy is a way of fixing bad behaviour. It's only seen as bad in itself by people who are immature, or just lack the ability to accept criticism. Of course, you can argue that a specific bully is off the mark, but the act itself is very healthy.
It's true they're usually normal people. No one is pure evil. But I think it's a bit naive to think bullies are just trying to correct or improve their victims. We shouldn't assume it's tough love. Most of them are doing it for personal pleasure, and their motives are destructive. However, if you said ill-meaning bullies can still be useful in helping one build a thicker skin -- serving as unwitting training dummies, if you will -- I could get behind that.