it doesn't justify stealing

I agree in principal.

This has moved far beyond simply "an eye for an eye".

I strongly disagree.

Unless we have experienced that kind of prolonged attack I do not believe that any of us are in a position to negatively judge his actions. Those who have experienced prolonged abuse will be less inclined to make a negative judgment against him. He is only protecting what is his.
I would have done it very differently but only because I have spent time looking into the structure. You can not give any quarter to the psychopathic. They are lost forever