Leaving aside how we should administer justice for the moment, morally-speaking he deserves to be stabbed multiply and left to bleed in the gutter, and whatever sentence is passed on his crimes should take this into account.
This blog has attacked judges many times. On this occasion, I cannot summon the indignation. I have not the ability to explain the workings of the judge's mind. Hence the post title. Perhaps a team of anthropologists could be sent in, and by applying the methods used in analysing obscure New Guinean tribes and their belief systems, we could discover how this judge came to the conclusion that two years incarcerated at public expense is a fitting response to this man's war on the rest of us.