I think in most cases, I would agree in that you want to be beaten by the best. But when they are your sworn, mortal enemy, then I think the equation changes. Just my opinion. Back in the day, I would always pull for the Big East in the NCAA tourney, but never Georgetown. They were the enemy, plain and simple. Would a Bills' fan root for the Dolphins in the Super Bowl, just because they are a fellow AFC team? No way...I wouldn't pull for Miami if they were playing the Death Row inmate all-star squad.
Personally, I'd like to see Boston win so everyone (mostly just Yankee fans and Fox Sports) can finally shut up about "the Curse".