And if the abnormality is the result of psychopathy, not the cause?
In any case, we are not robots programmed by the structure and chemistry of our brains. My fear is that discoveries such as these will prompt people to start blaming criminal behaviour on physiological features, with brain surgery as the prescribed cure, just as ADD is overused as an excuse for misbehaving children with the result that children are being medicated with potent drugs.
Everyone still has the ability to choose their actions, and for everyone with a disorder that "forces" them to commit a crime, I'm sure you can find someone with the same feature who lives a normal life. Brains are not computers, you cannot expect to hack them for a quick fix to interpersonal problems.