The Islamic website Revolutionmuslim.com has allegedly threatened South Park creators Trey Parker and Matt Stone with a fate similar to Theo Van Gogh for “insulting” the prophet Mohammad during it’s 200th episode. In that episode, Muhammad is depicted in a bear suit. Van Gogh was a Dutch filmmaker who murdered in 2004 for making a “documentary on violence against women in some Islamic societies.” The website shows a picture of the Van Gogh with the caption, “Theo Van Gogh – Have Matt Stone And Trey Parker Forgotten This”.
Here is video of Matt and Trey talking about using Mohammad in their show: http://www.youtube.com/user/boingboingvideo#p/u/0/Vp9bYLa5gaA (NSFW:heavy language)
The Islamic website also linked to an Huffington Post article that described where the two South Park creators lived.