Since being single and my kids getting to the age that they have their own lives leaving me with free time the gym is the one place I have made friends as an adult. I don't connect well with people at work, I get along well with people when I go to shows and such but most of those people have no kids or real responsibilities so they don't get the structure of my life but the friends I have made at the gym are so much closer to my frequency that we've actually become real friends. I would guess fats don't like those types for the same reason I don't click well with party types, lifestyles are too different. For fats I'm guessing humans who manage their lives, bodies, and have structure trigger them, hence calling them smug jerks. They're not, they just have their shit in order and are confident.