How about this scenario instead:
The Air Guard contracts with a billboard company. The deal is that, for a fee, the company will create a design and then display it on a particular billboard for two months.
The Air Guard gives the company its specs for the graphic design. The company does up a design and sends a proof to the Air Guard for approval. It meets all their specs, but also has a banner across the bottom that says "Praise Jesus!" The Air Guard looks over the proof, says, "yep, that's fine!" and the company puts the ad up.
In that case, would the establishment clause have been broken?
If yes, then why not for the race? In both cases, the governmental agency would have had the ability to approve or deny a product that included a religious message (and one that was specific to a single religion, to boot).
