The worry seems to be that people will assume that shooting a gun within the cathedral is "acceptable" and try to emulate it in real life. Or that it will act as a catalyst to increase the already present gun-crime problem in the city. The Church of England seems to have the idea that Resistance "shows a virtual shoot-out in the cathedral's nave in which hundreds of soldiers are killed". This is only true if you consider crawling Chimera beasties as "soldiers." The cathedral section is a very small fraction of the entire game, lasting only 20 minutes, if that. It contains only alien enemies, as the rest of the game does, and includes no cutscenes or story elements which show a single human death.
Sony have yet to officially respond to the Church but a spokesman told the Times newspaper that "It is entertainment, like Doctor Who or any other science fiction. It is not based on reality at all." He also states that permission was sought when necessary, throughout the entire development process. Funny that they mention Doctor Who, considering the recent episode which ended with a man transforming into a monster and chasing his victims through Southwark Cathedral before being killed. We wonder if we'll see a battle to get those DVDs removed from shelves, once they're released.
[Thanks to everyone who told us about this]