True, and we'd be crazy not to pursue every lead, and everyone who could have a motive. I'm just suggesting that all the clues we know about so far are more consistent with someone who is not associated with al-Qaida.
It still could be. They could have used "God" instead of Allah on the tarot card (another Islamic no-no) to throw us off.
But generally, terrorists brag about their accomplishments, not try to pin their actions on someone else.