Karl Rove got Osama to come out with this speech (part of the strategery). The last time Osama did this, right before the 2004 Presidential election, Bush's polls went up and Kerry blamed his loss on Osama.
Yeah. That's the claim over at DU.
I say Rove just fired up the Islamofascist Diatribe Generating Machine (developed in the tomb of Skull & Bones, of course) and let 'er rip!;))