FELLDUST: FOR A BETTER TOMORROW
if you believe in a better tomorrow. if you believe that things can get better. if you believe things can change. then fight! fight for a better underground. fight for a freedom you never knew. fight for a tomorrow you thought you'd never see. if you're tired of asgore's tyranny, you will fight. you will join the resistance.
sans sees his brother slain and, informed by the history of betrayal routes decides to overthrow the government and have none in it's stay. he's already a dead man why not rally the underground's building resentment towards asgore. sans incites political violence and kills people based on their allegiances.
tl;dr sans is a bad person doing bad things to build the infrastructure for a better tomorrow










