Earlier quoted context omitted.
He is not a felon convicted for illegal possession of a weapon or drug dealing, he's a warlord that killed a lot of people brutally. Presenting rehabilitation as a possible solution here is laughable and almost insulting to the memories of his numerous victims.
I don't understand. Why would it be?
This man is a war criminal that that was directly and indirectly involved in murder and rapes. Worse, he actively enabled that behavior in his organization.
Now in an exercise in empathy, put yourself in the shoe of someone who saw his entire family be massacred. You don't understand why theymight find it insulting to their suffering that this man is eventually allowed to walk free.
To be clear you can disagree, but I really doubt that you don't understand.