Raider defender penalized for ... thanking God?

In the days where players that dance, gyrate and posture after making a simple tackle, Raiders cornerback Chris Johnson was penalized for unsportsmanlike conduct during Sunday's 29-6 loss to the Texans. With the Texans on the Raider 19 yard line, with 51 seconds left in the 1st half, Johnson picked off a Matt Schaub pass in the end zone, intended for Andre Johnson. The 7th year defensive back dropped to his knees and threw up his hands in praising God. The official in the end zone threw a flag because he felt that gesture was an excessive celebration.

See Johnson Interception

I watched the much hyped Viking Packer game the next night where Viking DE Jared Allen celebrated after every sack. The Lambeau leap, whether it's the the Packers or Chad Ochocinco. There are blatant excessive celebrations every week that never draw a penalty. So, why throw a flag on a player who's giving praise to God? The fact of the matter is, the NFL suffers from inconsistent officiating. Especially when it comes to the celebration rules. I didnt think there was anything excessive about what Chris Johnson did. What do you think?