Don't get me wrong, I can't stand ND. I also don't like how they can continue to play independently without a conference. However, I give them credit (as hard as it is to do). They command the attention, viewers and dollars which allows them to do this. If they didn't, they would have been forced into a conference long ago. Are they using the ACC selfishly? Sure, but so is the ACC (using ND) or they wouldn't have agreed to the arrangement.
To say that their arrangement with the BE led to its demise is a bit over dramatic. BE leadership (if you can even call it that) is what led to its demise. A complete lack of vision and forward thinking mixed with always one step behind is largely what led to its demise. The BE got so far behind in the game that once they finally got the memo to be proactive, the conference had so little weight and respect to attract the teams it desperately needed.