Look, as much as we might hate it given the whole Durant thing and how unlikable this Warriors team has become, it's objectively in the C's best interests for the Warriors to beat the Cavs.
There are many around the league that truly believe that had Golden State won the Finals last year, Durant would've been in Celtics green this year, and I think that's probably accurate, too. This is because not only would there be no way that Durant could've joined that team after winning the title while saving his reputation as a top-3 player in the league, it also would've made James and the Cavs look much more beatable and vulnerable in the East, along with the Warriors coming off of back-to-back titles looking invincible.
From the Celtics perspective, the same is true this year. Our two biggest free agent targets in Hayward and Griffin are in the West. So, from Boston's perspective, the best thing that can happen for us is for Golden State to win, and win handily. If the Warriors go out and spank the Cavs, then that shows both Hayward and Griffin that going East to Boston is much more likely to amount to surpassing the Cavs than staying in the West will lead to surpassing the Warriors. And this doesn't even get to the fact that Lebron is aging and going to be losing a step in the very near future; whereas, all of the main guys in Golden State are in their prime and have many high-level years left.
So as much as it might pain us to do so, we all should be rooting for the Warriors to come out and stomp the Cavs. I think this would be very beneficial to our free agent pursuits and allow us to show those free agents in the West that the easiest and really only path to the Finals is through the East, specifically Boston.