So what? Some laws in countries like the US and Britain call for killing people as well. But that doesn't make all laws in such countries incitements to kill. There was recently a fatwa issued in Britain calling for women to take off their head scarves if they were concerned that by wearing them, they were putting themselves at risk of being harmed by non-Muslims. It was a fatwa, but it did not incite to kill.

A fatwa condemning al Quaeda can very easily be a ruling that Muslims should not follow people like Osama bin Laden. It doesn't necessarily mean that he should be killed.

A fatwa telling Muslims that they should not follow the likes of Osama bin Laden is a good fatwa in my opinion.