This question indeed illustrates the part that so many don't understand about a military regime: the depth of cruelty that they represent. These regimes use degridation and oppression to kill and govern. They have no idea about a constitution which confers its citizens with rights. A democratic constitution would impose such unwelcome restraints on their wicked impulses and they'd see adhering to that as a sign of weakness, not liberty.
They use man's propensity to lord what little power he has over others. While Kim and his cohorts deserve most of the blame, such horrors would not be possible without the thousands of other petty tyrants willing to inflict cruelty on their fellow humans for far lesser rewards.