My thinking is.. if they lose this it's probably because the officiating was wholly one sided for several games to an extent to which I'd stop watching the NBA. I've watched more NBA basketball because of this team and this run and despite the last five quarters I really don't think the Mavs are superior to all of the Celts opponents this year..which should mean they're not able to win three in a row let alone four.I picked other, because in the deepest sense, I don't like the NBA anymore.
But I do still love the Boston Celtics.
If they were to botch this, I would consider it the worst choke in sports history, easily eclipsing the 2003 Yankees. That said, I don't think they will. Ball rarely lies for more than a game or 2 in the NBA, and the Celtics are a better team.
Edit: also there's a reason why no team has ever swept both the ECF and Finals... winning that many games in a row in the playoffs is extremely difficult.