People say United are hated because they are successful. Whilst there's surely an element of that involved, I don't think it goes far enough. I think United are hated (and we're talking universally here, by fans from all different types of football club, not just City) because of how they act. Success doesn't have to breed arrogance. It doesn't have to result in a sense of entitlement. You don't have to become condescending or self superior. You don't have to be a poor winner, and an even poorer loser. You don't have to use your financial, and footballing hierarchy, influence to ride roughshod over the rest of football. You don't have to attempt to create a monopoly within football whereby your own interests are served ahead of those of the game.
People don't hate United because they win things, they hate United because of how they achieve their success, and how they react to it.
Totally agree with this. United fans are the only one's arrogant enough to have the ABU(anyone but united) saying, calling anyone who doesn't want them to win an ABU.