
My only thought is...well...it would bother me to see Christ on a license plate. A license plate is just banal and utilitarian, and I prefer to see holy images in holy and lofty places where they can be given the respect they deserve.
Muslims ban the image of Muhammed to be depicted because they believe it detracts from the worship of God as a higher concept, a greater being. I think this license plate just finally allowed me to grasp that reasoning.