IraqPundit amplifies that broader point, tying the assassination to the battle for Iraq:
Yet it appears that al-Qaeda continues to see its role in fighting Westerners and modern, liberal Muslims as a global one, not something limited to Afghanistan and Pakistan. There's an unconfirmed report that says al-Qaeda took credit for the murder of Bhutto and several bystanders. Of course we don't know yet who is responsible, but it is worth mentioning the claim:(via Best of the Web, Instapundit)
"We terminated the most precious American asset which vowed to defeat [the] mujahadeen," al-Qaeda is quoted as saying. The message is still being checked, but al-Qaeda certainly had made it clear that Benazir Bhutto was a target.
And the Associated Press reports today that a message from Osama Bin Laden is expected shortly. The story says [the] terrorism monitoring group, SITE, says Bin Laden "will discuss Iraq and the group the Islamic State of Iraq, a longtime foe of the Iraqi government and U.S. forces."
I don't think we need any additional proof that al-Qaeda and their ilk think its their duty to murder modern, liberal Muslims wherever they are -- in addition to everyone else they disagree with.