No one doubts that South Park is offensive to practically everyone. But most people do not make a connection between (a) being offended by silly cartoons, and (b) butchering the people who make the cartoons. To make such a connection, we need a bridge between offending and killing. That bridge is Islam, which calls for the deaths of those who insult Muhammad.
However, the validity of this bridge depends on whether Islam is true. That is, if Muhammad was a false prophet, no one should be killed for insulting him. If, however, Muhammad was a true prophet, then his commands to murder critics should be followed today.
There's very little disagreement between me and Revolution Muslim when it comes to Islamic teachings. But there is a massive difference between me and Revolution Muslim when it comes to whether Islam is true. If I believed that Islam is true, I might be threatening Trey Parker and Matt Stone too.
It seems that much could be solved by resolving the question of Muhammad's prophethood. I'm perfectly willing to address this issue in public debate. Unfortunately, while Revolution Muslim loves to instigate their fellow Muslims to violence in defense of Muhammad, they refuse to defend Muhammad rationally.
If you watch Revolution Muslim's videos, you'll see them constantly challenging people to debate. Even in their response to criticisms over their threats against Trey Parker and Matt Stone, Revolution Muslim says they're ready to defend their views in debates. Yet Sam, Nabeel, and I are all ready to debate, and I've challenged Revolution Muslim to defend their prophet in public.
Why do they back down? Are they bluffing? Are they tossing around debate challenges because they don't think that anyone will actually debate them? Well, we're waiting. I live right down the street from them, and I'm ready.