A demagogue is they key to making this whole thing work. You litterally use their comples against them by playing into it. There is only one outcome to giving fats everyrhing they want, that is thier utter destruction.  Think about it like this, say that fat shaming became illegal somehow. You can't force normal humans to stop thinking ill about the lard bardges. It's like that one person in that everyone hates and it doesn't do any good to argue with them so you just smile, nod and walk away. In the end they never get what they want, we tell them we accept them, but we clearly don't act like it. Just makes it all the more worse for them because they know there isn't anything more they can do and they see the reality, if no one is allowed to call you a fat ass that doesn't mean you're not a fat ass.