I don't think it's as easy as "cheer for a Gopher loss and you're a Dbag".
The caveat of this question is the assumption that Tubby will for sure be gone with a loss. I think he's back regardless and therefore I will ALWAYS cheer for a Gopher win. However, because I don't think Tubby is the answer, I would gladly trade a loss in this tournament if it meant more wins down the road. It's like the Vikes - Redskins game of 2011. I was upset when they won that game. Why? It's the reason why RG3 is not our quarterback. It was nice to win, I'm a Vikings fan, but I think we'd get a lot more wins if RG3 was our QB instead of Ponder.
The Gopher fans who want Tubby gone would sacrifice this game on Friday because they think it would make the Gophers better in the future.
Let us rephrase the question, would you rather?
#1: Have the Gophers win, but never finish above .500 in the Big 10 conference in the next decade?
or
#2: Gophers lose and be a much better team in 2 years?
I can kind of understand the "I hope we lose so that Tubby gets fired" argument, but I disagree with it. With regard to the Vikings analogy you presented, I think it's a little different. First of all, that game against the Redskins was a regular season game, so it's not a big deal if they lose the game in and of itself, and the higher draft pick is a guarantee from losing the game. If they had lost the game, it absolutely would have given them a better draft pick, and in the long run losing the game would have very likely helped them in the future. But what if it were a playoff game? What if the Vikings had only made the playoffs 4 times in the last two decades, and hadn't won a playoff game in nearly 25 years? Would you trade away getting that playoff win in order to get a better draft pick the next season who MIGHT help you get back to that point in the future? I don't follow the Vikings or the NFL at all, so I don't know if getting one playoff win is considered as being significantly better than losing in the first round.
With the Gophers it's different. This is an NCAA tournament game, not just some regular season game against Purdue or something. We haven't won a tournament game since 1990, and have only gotten to the tournament four times since then, three of those being with Tubby. Technically, winning just this one tournament game would be our deepest tourney run in over 20 years. Do you really give up getting that big win for the chance that we MIGHT get a guy who can do better in the future?
Even in the context of this poll in which a tourney victory means Tubby is absolutely back next year, and a loss means Tubby definitely gets fired, I think people are looking at it too black and white. It feels like people think that Tubby is the absolute worst person we could have as a head coach next season, and that anyone that we hire over the offseason will have a guaranteed better record over the next few seasons or going into the future. I think people are seeing it as, "We give up one tourney win this year, and we WILL get Sweet Sixteens/Elite Eights in the future." But you don't know that the guy who replaces Tubby will be better. Maybe we lose all chance at getting Rashad, Tyus, and Reid. Maybe the next guy is like Josh Pastner, or this year's Calipari, and gets all three of them along with other stud recruits from out of state, and still only gets the team to up to a fringe top 25 type at their peak. The poll says that firing Tubby is a guarantee after the first round tourney loss, but getting a coach that's better than Tubby is not. I would like to think that if Teague doesn't have Shaka Smart by the balls like some think he does, that he could still hire us a good up-and-comer, but it's not a lock that he will. And keep in mind, you're trading an NCAA tournament victory, something this program hasn't accomplished in over two decades, for the chance that we might get a coach better than Tubby.
That's not even looking at how this might play out in real life, in that a first round loss doesn't guarantee that Tubby gets fired, and a first round victory I don't think makes it a lock that he stays, although firing him after arguably his best season, regardless of how underwhelming his best season turns out to be, might look bad.
TL;DR If you're voting for the team to lose so that Tubby gets fired, you're trading in our first tournament win in over 20 years for a CHANCE that the next guy will be able to do better than that.
I will be cheering for the Gophers to win on Friday.