You see, he chose to play football each week with a Scripture written in his eye black. And a lot of folks got angry. Apparently, he's a very conservative Christian guy and rather than wear his faith on his sleeve, he wears it under his eyes. And it earns him a lot of flack.
Why is that? We accept far more from others. Have you seen the permanent tattoos of guys like Tommy Lee or Allen Iverson or David Beckham? Terrelle Pryor used his eye black to show support for his friend, "Vick." Why can't Tim give glory to God? What's up with that?
Again, this is NOT about football. If you are led to comment on his on field performance, his record, his team, his rivals, etc., it means that you don't comprehend well, since you missed the entire point.