It's incredible how viral beliefs can be, but of course the ground they're seeded in is fertile.  This Fat Acceptance worldview is a natural extension of the obessive American glorification of the individual.  It has morphed into uncritical self-worship--you are always correct; what you feel is most important and it is everyone elses responsibility to not offend you;  you deserve everything you want in life even when it is to your detriment, and you shouldn't have to work for it;  people who want you to change are bad because you are perfect just the way you are. You are spot on in calling this FA shit narcissism, because after all, what does the narcissist say when all the evidence of the world contradicts them?    The world is wrong.