I don't think any ref is fixing games
intentionally. But the argument that the games aren't fixed don't hold a lot of water either. The argument about the three ways fouls are called in IPs post, for instance.
It would be hard to dispute that the Messiah (primadonna

whatever) is officiated by his own rules. He doesn't travel. He can draw a foul on anybody within half court of where he is. Even though sometimes the person "committing" the foul isn't around the play. Etc.
Brendan Haywood's foul against any other NBA player is at most a flagrant 1. I would challenge anybody to dispute that. Brendan Haywood is also Washington's best low post defender and best shotblocker. Whether the ejection from Haywood's foul is intended to fix the game in Cleveland's favor, without question, it does. No intention intended by the official. But the result, with or without intention, is exactly the same.
That argument could be applied to any star call and how it changes the nature of the NBA game as a whole.