I get what you're saying about specific parts acting in specific ways. Neuroscientists have been working of the modular theory of the mind for a very long time now. I'm not saying it's the wrong approach but morality is a really high level construct and to say it is localized to a very specific region just seems absurd.
The modular theory of brain function has given way to a more nuanced understanding. Some functions are very localized, while others are quite variable between individuals. Functional localization depends on many factors, such as the wiring of afferent and efferent neural tracts, gene expression, and plasticity. For some functions, this strictly constrains the location, for others it doesn't.
But, the point is that it doesn't matter if it seems absurd to you that something "high-level" like morality is localized. The evidence says it is.
I disagree. All they have shown is that some higher level reasoning which factors in moral decisions is hampered when some part of the brain is not allowed to function properly. If you see evidence of localized morality from this then you need to take a closer look at the paper because the evidence does not say that.
