Honestly, I can't figure out whether, by "fat kink," she means fatties with kinks, or fatties who enjoy being the fetishized subject of others' kinks. She's so far up her own ass, she's not making sense to anybody but herself.
@Crepidodera fulvicornis , NAAFA (National Association for the Advancement of Fat Acceptance) almost never get mentioned in the highly politicized FatLib social media circles Kelly hangs out in. It was originally founded by middle-aged white guys with fat wives who fetishized fat women, which makes it problematic, even though social media fats owe it a huge debt.
I have no idea whether Kelly has a problem with NAAFA or not, or what exactly that problem may be, because she's not stating her complaint clearly. I'd have to go digging to see if they have some sort of anti-kink or anti-fetishism stance they've come out with recently, and honestly, I don't care enough to bother.
What I do find laughable is that, for someone who claims to have "long Covid" so badly, and is debilitated by it, she's got enough energy to throw a fit about fatty kink-shaming. Or that she was outraged at not being embraced by and made a leader in the historic costuming community—something that would require a talented, organized person to expend a considerable amount of energy. If she's so sick, why is she concerning herself with these things, and putting her limited energy into them?
She's an isolated, friendless Narcissist, desperately seeking attention and validation, not getting it, and it's driving her mad, so she's lashing out in random directions, hoping something gets a reaction. And
@rocknrollmartian may be right, in that elevated BG levels may be playing a role in her agitation and incoherence (I mean, she posted a pic of her lunch, which was a grilled cheese sandwich and a pile of fries, which is hardly a diabetic-friendly choice).