There's a black power fist right there in the middle, literally replacing the A in fat. It's extremely racist. It's suggesting that being fat is like being black was. Like being fat is just like being a slave, being segregated from whites, being treated like a sub-human and having no rights. It's suggesting that being fat is so bad, that they need to form their own 'fat power' group equivalent to the 'black power' group, because obviously fatties have it just as bad as black people did.