Well, for one, the current "regime" are purely businessmen and women. I'm sure plenty of United fans have a whole host of issues with them, most of which, are purely based on the way they operate the club as a business. The debt, the taking out of money, the takeover itself, few of us are fans.
What they haven't done, is bomb people into oblivion, beheaded a few dozen people recently, disappeared a journalist or a whole host of actions that should lead anyone to be at least concerned over such people taking over United.