"The people in our Governments, who pushed this wickedness, with the weight of law, must die – and they must die so slowly and in such indescribable agony that, in one-thousand years time, humanity will speak in hushed tones and usher the young outside when detailing it."
- Wes Rhinier
I say we research every form of horrible, cruel and painful death, all the way back to biblical times. Use each one in turn, bringing these scum to the brink of death and then nursing them back to health without pain relief, only to impart the next method the same way. When their body won't take much more, use one of the methods that always ends in death, like say... impaling. To make the process last longer, alternate the evil-doers with their parents, wives, and children. And have those not being sliced open or burned, watch the others so everyone of them will be shining examples of how not to act against their fellow man for thousands of years in the future.