Actually, making them spend the rest of their lives behind bars contemplating the act of thoughtless loyalty to their DIETARY LIFESTYLE and its consequences to the innocent life entrusted to their care is far more cruel than simply executing them.
I only wish it was life in solitary confinement without possibility of parole. Then there would be nothing to distract them in their meditations.
They probably would not last all that long before insanity or death (or, hopefully, both) overtook them.
Not that I’ve ever eaten it first hand, but I suspect prison food is pretty high in pork products, cheese and starches.