By being a fucking annoying SJW and attempting to hijack public perception of fatness by flooding the media with "fat positive" propaganda and shouting down anyone who speaks common sense facts about the unhealthy nature of obesity by calling them "cruel, hateful bigots." Deep down, they fucking hate themselves and their bodies, but they feel like if they can make everyone around them comfortable with the existence of their fatness, then they can be as "comfortable" as possible without having to actually make any changes to improve their health.