Honestly, this is only going to continue until the end of time. Christians have their fundamentalists, Muslims have their fanatics. I think people should just grow spines and ignore the protests and outrage unless it's very plausible someone is going to kill them. Honestly, if I were in the South Park creators' (and Comedy Central's) position, I wouldn't take these guys seriously until I find a death threat in my mailbox.
"There is no such thing as coincidence, only inevitability" - xxxHoLiC
"Justice? But I don't serve justice, Watson, I serve the truth." - Sherlock Holmes