That was an interesting read, FN. It makes a lot of sense.
I don't know whether empathy can be taught. Very young children can't feel it, of course, but older ones do. I don't know if that is because they have been taught it (either by example or more formally) or if it comes naturally to them.
Certainly people with personality disorders don't feel empathy, and I don't think they can be taught it, as their brains are configured differently from 'normal'. Presumably most of us are somewhere in the middle between pathologically empathetic and psychopaths, on some sort of sliding scale. Most people understand where others' boundaries are and respect them even if they don't share them, and for those who can't, schemes where victims of crime talk directly to criminals suggest that there is some scope for teaching it.
I don't know who would be able to teach empathy in schools (as opposed to prisons), though. It could do more harm than good if not dealt with by psychologists, and I don't know if that is in the remit of a Ed Psych? There are those who just don't care if they hurt others - not just criminals, but people who insist that they are just 'straight talking', or believe that trope of 'just saying what everyone else is thinking but is too scared to say'. that is nowhere near axe murdering on the unsympathetic scale, but it is part of the same ability to 'other' anyone who thinks or feels differently from them, and not care if they are hurt. If someone like that is in a class where someone is attempting to teach empathy and doing it badly, they might just end up with more ammunition to use against their targets.
My understanding (from a relative who works in MH in prisons) is that inmates are very carefully screened before being allowed to meet victims, even after therapy - by no means all who apply for the programme are successful.