fat people

Remember the Randy Newman song "short people"? I remember reading a short essay, probably in readers digest at my folks, by someone who was pissed they got seated next to a fat person on a plane and ended up having a long chat with the woman which she enjoyed very much. I like to think I am a really tolerant person, so why is it that I can't tolerate the obese? an adulthood of compulsive exercise? It's not just having to sit next to some spreading over my space on public transit. Why, when I see an obese person in a scooter at Target, do I want to say, "If you got out of that thing and walked, you wouldn't be so friggin' fat"?