it happens every game, every team. refs are human, they make mistakes. generally they do a pretty good job as a group. but just like you, they aren't perfect.
I don't want to rip you here, but the NBA lives off of an Economic Food Chain. The officials are paid by the league, the league gets its money from TV deals, TV gets its money from advertisters. Advertisers want big draws, big cities, big names. The biggest name Sacramento has is Webber, and his drawing power has faded over the years. As a city, Sacramento isn't that attractive a marketing lure. Sure every team gets bad calls, but Sacramento has never had a season where they 'got' the calls. Not that I can remember. And it's not just bad calls, but more or less the concidental nature of the bad calls that it so very suspicious. The bad calls vs the Spurs in the last game didn't matter, but tonight (as someone pointed out) the calls kept coming at moments of momentum for the Kings. They were constant momentum killers through out the game. The Kings had a lot going against them tonight, from injuries to the bounce of the ball(so many rebounds bouncing off of multiple Kings) and it just is frustrating to see the officials add on to it. The Indiana Pacers(another small town) have had the same problem for years, getting constantly burned by calls in games against big markets like New York and Chicago. It's so coincidental, that once you look how the money food chain works then you realize it's less coincidence and more purposeful.
Plus, you add in the normal refs you see with a bad history of calls in the past, like Dick Bavetta, always showing up in big games. They are just the NBAs policers for profit. The NBA doesn't hire refs out of college or elsewhere, they prime them themselves. It's not a conspiracy theory, it's just common sense and insightful observation.