This is hardly new, didn't he say something similar himself in his videos? The point was to trick the US into radicalizing the populace via increasingly barbaric acts of warfare and secret policing. He wouldn't be the first terrorist to make such a claim and, tempting as the "don't you see you are playing into their hands!" argument is, it always smells like post-hoc justification for a failed military campaign.

Edit: Sorry should have read the article didn't realise it mentioned the mans own arguments.