Take this for example -
http://on.nba.com/1G6df72 (click on Tristan Thompson's steal to see the ensuing play)
Klay's called for his second foul in the 1st quarter [he exits the game], when he made NO contact with Shumpert's hand/arm when contesting the layup. At this point, he had nine of the Warriors' 11 points within the first five minutes of the game; the Warriors are leading and have the momentum. This mistake from the officials changed the flow of the game, which allowed the Cavs to equalize the momentum - taking away any advantage Klay and the Warriors potentially would have had in quest of extending their lead in the first quarter.
That blunder from the officials meant the Warriors went
12-13 possessions without a player that scored 81% of their points up until the point he left the game. Yet the majority doesn't wanna acknowledge the damming effect it had on the Warriors, because i) it happened in the 1st quarter ii) they're too caught up in this agenda of pushing the contrary.
And that's only ONE example of a call/non-call going against the Warriors.