I agree there is a bias against calling RTP against Dallas Cowboys opposition. I've seen many blatant hits that draw the penalty around the league that don't get called when Romo is the QB. The cause of this bias is uncertain but I absolutely believe it exists in this instance. Refs don't want to protect Romo for whatever reason. If I were Jerry I'd be demanding an explanation from the league and put together a tape of all the times Romo has been illegally hit without a penalty.
If he whines enough they'll probably have to change their tune and start protecting Romo.