Fenixp: Second of all, every human being deserves a fair trial before being sentenced. What happened there was an assassination. I do not, for one, want to live in a world where a person can get killed with no trial and no consequences - and that applies to the variety of wars US is going for as well.
Edit: One blurry video is hardly any kind of evidence now is it? It could have been forged so easily - and whoever did it would surely find it convenient that americans attacked Al-Qaeda, don't you think?
It was much more than one blurry video. He sent out several tapes over the years, not just the one taking credit for September 11, instigating violence towards Israel and the U.S. (heck, against pretty much all Christians and Jews, really). This tapes were vetted not by Western media outlets, but by the outlet they were delivered to in Qatar (Al Jazeera maybe, I really can't remember). Neither he nor ANY of his family ever tried to even attempt to dissuade anyone that he was the mastermind behind the World Trade Center attack OR that he was the person on any of the subsequent attacks. No, sorry, he was guilty, he admitted as much several times over.
The only thing a trial would do is cost the American taxpayer money and possibly drag the U.S.'s name through the mud. These are two things that I have been getting a bit tired of lately (even if we do deserve the latter for some of our past actions, it gets old). So... yeah... I am firmly in the 'face-shoot the fucker' camp.