I understand your point, however talking to the ref is one thing. Showing emotion is one thing. Throwing your arms in the air demonstratively or showing up the ref is another thing. Nash should have gotten a tech for dribbling the ball facetiously at the ref. The Nuggets and Suns are really good at playing to their home crowds any time there's a whistle, and the league should have put a stop to it a long time ago, so it's going to look harsh for a while until it gets under control.
I've never seen a ref whistle a guy for a foul, have the guy throw his arms in the air in a big theatrical shrug, and seen the referee respond by saying, "Oh, because of your reaction you must not have committed a foul. My mistake. Inadvertent whistle!" Until that happens, the players need to shut the up already.