Are sociopaths born that way or is it bad parenting or something else?

Antisocial: Sociopathy can result in young adults with history of conduct disorder who have early history of oppositional defiant disorder who at earlier age had attention deficit disorder that was not treated. No studies confirm inheritance as a cause. Is more common in males.

Nature/nurture: There is a nature and nurture component in personality disorders such as psychopathy (AKA antisocial personality disorder) however it's not a question of genetics or environment, it's usually a combination of the two.