X-tians upset at Last Supper spoof

Apparently the Folson Street Fair in San Francisco came under fire for using a poster that parodied da Vinci’s “The Last Supper”:
Forget for a moment that it’s a really fantastic picture — how is parodying da Vinci’s painting a sacrilege, especially considering that “The Last Supper” is one of the most parodied paintings in existence? And what sets this one apart from all the other parodies? Hmmm?
Skeptico talks about it here.
Dan Savage collected a few other examples of “The Last Supper” that didn’t get so much attention, suggesting the Folson parody was targeted because of the homosexual aspects of it (and, presumably, the homosexual aspects fair as well). Strange, since the other parodies are probably just as controversial. They cover themes such as fast food, sexuality, science fiction, alternate religions, and, um, quilts…. In each case, the central character is likened to Christ, and this can make a profound statement, depending on the context.
My personal favourites are the Zombie Last Supper (Great Zombie Jesus!):
… and the Star Wars Last Supper:
Other Last Suppers: Where’s the Outrage? | Slog | The Stranger | Seattle’s Only Newspaper
I also found an X-Files Last Supper. They should add this to their list: