'South Park" is hilarious, right? Not any more.

Last week, Zachary Adam Chesser--a 20-year-old Muslim convert who now goes by the name Abu Talhah Al-Amrikee--posted a warning on the Web site RevolutionMuslim.com following the 200th episode of the show on Comedy Central. The episode, which trotted out many celebrities the show has previously satirized, also "featured" the Prophet Muhammad: He was heard once from within a U-Haul truck and a second time from inside a bear costume.

For this apparent blasphemy, Mr. Amrikee warned that co-creators Trey Parker and Matt Stone "will probably end up" like Theo van Gogh. Van Gogh, readers will remember, was the Dutch filmmaker who was brutally murdered in 2004 on the streets of Amsterdam. He was killed for producing "Submission," a film that criticized the subordinate role of women in Islam, with me.

There has been some debate about whether Mr. Stone and Mr. Parker should view the Web posting as a direct threat. Here's Mr. Amrikee's perspective: "It's not a threat, but it really is a likely outcome," he told Foxnews.com. "They're going to be basically on a list in the back of the minds of a large number of Muslims. It's just the reality." He's also published the home and office addresses of Messrs. Stone and Parker, as well as images of Van Gogh's body.

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