1. There was more than 2 minutes left, not less, and they had a time out.
2. At half-time Stewart didn't just have the int you mentioned, he was also 18 of 25 passing, a 72% completion percentage, 246 passing yards at a ridiculous 9.84 yards per pass attempt attempt (Mariota led the nation last year at 10.01, #2 was 9.54), and had 3 TD passes of 47, 25, 23 yards (avg td pass was 32 yards), all of which you failed to mention. Especially when considering our passing statistics since after 2009, Stewart was having a great half of quarterbacking the team and looked confident.
Statistically speaking, when team A starts with the ball inside their own 20, I'd bet team B is NOT the more likely to score next when there is under two mins left, as would have been the case after byu's possession even if it ended in a 3 pass and out punt.
The announcers were also puzzled, saying byu has shown plenty of ability and play-makers on O and already run a 2 min offense every possession to not be trying to score in that situation.
An int, fumble, or three and out were less likely to happen than getting at least 1 first down, based on what we had already done against them in the first half, especially if time wound down further and they tried some form of prevent D like so many D's do.
Boise didn't sit on the ball with a big lead with 30 seconds left in a huge bowl game and scored. We shouldn't have sat on 2:04 and a timeout the way we were pitching and catching it.
It was an very, very questionable decision.