>technically within the boundaries of his duty he executed
>convicted criminals

slavery was legal, so the antagonists were operating within the boundaries of their duties.

>people aiding and abetting convicted criminals
>and racists which apparently he viewed as an extension of his
>duty

oh, well in that case, why not just walk around in a murderous rampage. after-all, in his "view" they're racists.

>this is the actual depiction
>the rational of good/bad is on the audience

the depiction is exorbitant violence from BOTH sides.