To clarify, neither the study nor we are insinuating that weight discrimination is somehow "worse" than racism or sexism. However, unlike its competitors, weight discrimination isn't often talked about, and actually seems kind of acceptable. While we're all pretty much in agreement that you can't choose your sex and race, lots of people cling to the mentality that weight is not only a choice, but also a moral choice. "If those lazy bastards just had some self-respect, they'd put down the ice cream and get off their asses!" Yes, now tell us again about the time you had to sit next to a fat person on a long flight!
... Also, tell us about how when you eat ice cream, it doesn't count.
Never mind that researchers now know over 140 locations across the human genome that contribute to obesity in various ways. Or that whether or not you're overweight depends heavily on what part of the world you grew up in, what prescription drugs you're taking, whether you have children (yes, in the case of both mothers and fathers), and your income and demographic group. Think the problem is that people these days have simply gotten too lazy? Well, studies show that in parts of the country where physical activity increased, so did obesity. (Note: People who exercise tend to eat more.) Oh, and your "lazy" Western lifestyle burns the same amount of energy as that of your hunter-gatherer ancestors.