It’s a tool for oppression, not for change.
I immediately lose a little respect for people who make fun of ‘fatties’. For you fat shamer’s out there, I recommend you read this.
If you really want change to happen, if you really want to "help" fat people, you need to understand that shaming an already-shamed population is, well, shameful.
No one deserves to be told that they’re unsightly. But this is what’s behind this entire thing. It’s not about “health,” it’s about “eww.” Fat people are icky, and honestly, it’s only the ickiness factor that bothers you. I highly doubt it’s your concern for them that’s motivating you to ridicule fat people. As for why they’re fat, well, it’s irrelevant and no one’s goddamn business to begin with anyway.