I follow your reasoning Donuel. However, I also fear that you are aspiring to a sort of justice, which is not available in this world. Even the most unsavoury dictators have their supporters and apologists. That is one of the reasons why they are rarely subject to due process of the law, even after they have fallen. The most important thing is that they are prevented from causing further injustice. Genuine redress for victims is so rare (regrettably) that it seems almost futile to pursue it. For a start, who is going to accept liability? The most we can realistically hope for is that we will be more careful to prevent other tyrants from replacing the ones who fall.
I can well sympathise with those, who hope that after death, the thugs of this world will face a higher court in the next. In cases like this one it is a comforting belief. I hope they are right.