no it isn't... good can make mistakes, good can have to compromise, never did I say good CAN'T make any mistakes... genocide is a pretty big oppsie though... throwing the world into post apocalyptic points of light that are weaker against evil and almost leads to evil taking over is maybe the biggest mistake ever.
this isn't "Hey the goblin killed my best friend then surrendered but I killed him in anger then felt real bad about it and want to atone"
this is "The mayor is secretly an evil necromancer and has the town fooled, so I killed 90% of the town broke the kingdom up and then left... when I came back I wasn't remorseful but assured everyone that necromancer was a good guy but I had to kill him so I had to kill all those people too"