It's hard to understand for someone who's never played on the offensive side of a football team.
As a former quarterback, I can definitely attest to the type of camaraderie that exists between a QB and his blockers, a QB and his receivers, or a QB and his running backs. Because the QB is very vulnerable, both physically (since he's rarely able to get into a stance to protect himself from a hit) and figuratively (he is the captain and the orchestrator of the offense and takes the brunt of the blame when things go wrong), the other 10 members of the offense feel it is their duty to protect him from undue criticism.
Tony Romo is a grown-up man with enough of a brain to run the Cowboys' play-action offense, so to say that he let Jessica Simpson lose the game for them would be less than fair. TO knew this and felt very strongly about it. He contributed to the loss by dropping a few very catchable passes. The O-line contributed by missing some very key blocks. The D-backs contributed by missing assignments and giving up long passes. They lost as a team, and Jessica had nothing to do with it.
I could ask the same question about people who feel very strongly about religious beliefs and cry in a moment of intense emotion. Maybe they're crying because they know it's wrong yet are afraid to admit it and are scared.
Obviously, that would not be fair or justified, not to say the least about being rude and pretentious. Therefore, I will refrain from doing so and allow Terrell Owens the liberty of voicing his convictions in the manner he pleases, just as I would allow my wife, my mother, my neighbors, you, or even myself to express strongly-held religious convictions with emotion.