BS.
AQ has tried to kill Musharaff at least 3 times, probably more.....
You are too naive. AQ is not 1 cohesive organisation and Mush has been financing jehadi outfits in Pak for decades.
Also remember such attacks can also be orchestrated by Mush himself to convince people in the western world of his "credibility" ie to fool people exactly like you.. You have no freakin idea how murky the water is.