Tell me one good reason why you would forgive your murderer

They didn't forgive him.
They (minus Cassidy) just decided to leave him alone.
Nothing's gonna stop him anyways, so why would they spend time even trying to forgive him?

Not sure if you understood the meme, but I'm saying that in those ''William Afton stays with the missing children in a room for 24 hours'' gacha life videos, at some point they feel pity for him and forgive him. And they always use the '' He wAs beINg cONTrollEd by GlitCHtrAp'' bullsh!t. Like, MY GUY, DO YOU EVEN KNOW THE LORE ? Glitchtrap didn't even exist when the Missing Children Incident happened, and how could he controll Willian if he IS William ? And even if it's your AU, IT STILL DOESN'T MAKE SENSE !!!!!!!!!

The only acceptable apology is changed behavior

Sorry but did you even read my comment ?

Yeah. I was adding on lol.
Sorry for the confusion