Acceptance should lie on subjects that are not controllable by the sufferer, that may change him physically or behaviourally, but not by his own choice.
While being fat, in very rare cases, can be genetic, in most cases it can be attributed to a bad diet, lack of sports, unhealthy eating habits, and just generally being a lazy greasy bastard.
A part of obesity which I’m still hesistant on is that caused by poverty. This subject is, for me, still open for debate. Is poverty a valid reason for obesity? Is the lack of an education in diet a cause of junk food and drink, overeating… Is the fact of having parents that work too much to prepare a healthy menu, or with not enough money to pay for one, a convincing factor behind obesity?
This is, I think, a much more pressing issue than genetics.
To answer your question, no, I don’t believe being fat should be accepted. And I don’t mean the “you exist, lemme help” kind of accept, I mean the “fat is beautiful, here’s a morbidly obese model” accept.
If it is linked to poverty, then it should be treated like poverty. Something to eliminate as society progresses.