Good point, Chongo. No real Muslim would do it. And I also agree that certain atheists might consider doing it. But as Donuel pointed out, "militant' isn't quite the right word. "Atheist pranksters" would be more like it. Think Bill Maher gone wild.
But no real Christian would have made that "Innocence of Muslims" film, either. Hate-filled fake Christians made it.
And remember that they tried to pretend that their anti-Muslim film was made by Jews. That angle hasn't been discussed much. Not only did they try to enrage Muslims, but they made a feeble attempt to direct that anger against Jews.
So they could just as easily make the film Bobert suggested and pretend it was made by Muslims. Or by Jews, depending on what their true agenda is.
Or hate-filled fake Muslims could do it, if there are any.