I wouldn't say the officiating had NOTHING to do with it, but I don't think it decided the game, either. In my estimation the nail was driven into the Cavs' coffin after the no-call on Steph and Klay when LeBron caught the long pass and then the refs T'd up Ty Lue for stepping on the court. The Cavs kept getting baskets but couldn't get enough stops to build up momentum, and they finally got a defensive rebound and caught LeBron way down the floor for what should have been a fast break, but the refs not only took away that opportunity from the Cavs, but they give the Warriors free throws and the ball.
I'm a huge LeBron fan, but I don't think the Cavs even take a single game this series. The Warriors got better after last year, the Cavs got worse.