That's because there are members of certain other religions you definitely don't want to piss off!. . . Funny how Christians do seem an easier target for satirists/comedians than certain other religions...
As for the "devil buns" and the Jesus references, I find the whole concept delightfully cheeky and irreverent (but then, I'm not a Christian). I mean, the business is called Hell Pizza. What did people expect?
Since when? Did you miss the whole Southpark-Muhammed debacle???
One of these days we'll all be too busy to have the energy to be offended by stupid shit like this. You know what offended me today? The fact that gas is $3.89 a gallon again and nobody's talking about it because they did it gradually so that we wouldn't notice as easily.