I think you're missing the point of the letter. Bison, eagles, wolves, and other animals have always had a special place in NA religious and cultural life. By using the argument that these "icons" are essentially being blasphemed by teams using them as mascots, the writer is taking a similar tack that was used to attack UND's use of the Sioux name/logo. If that argument gains traction, 'su, BC, Maine, Michigan, BSU, Wisconsin, etc. could be facing their own little wars since somebody took it upon themselves to be offended by their use of "religious" symbols.