I realize that a random blog reporting what an unnamed ND booster supposedly said needs to be taken with a grain of salt. That said, the details in the article make sense to me.
I was confident that the BYU-Big East deal would get done because it made both sides so much better off. So I'm convinced someone was obstinate/irrational given that the talks fell apart. This is a very plausible description of obstinacy on the part of BYU -- namely, being unwilling to trade 2 national broadcasts a year for a BCS conference, better competition, access to bowl tie-ins, and (very likely) more money. I can understand why ND would be livid about this. ND wants what's best for ND, but at least the Irish realize that their interests are served by a viable Big East. BYU doesn't seem to have grasped that basic fact.
I'm intrigued by the notion that ND and Boise State might threaten to drop BYU from their schedules. Somehow I doubt that BYU would cave to strong-arm tactics (they seemingly would be happy to play 6 FCS teams at home each year as long as they are nationally televised games), but you never know.