Hahaha ... well there goes our whole justice system, the ideology behind it and core British values of justice which we've exported to the world!
What's the point of having ANY trial if you believe hard enough that someone is guilty? That's the Isis way I guess! It was the Stalin way and it was the Hitler way too but at least they might put on a show trial. Given that way of working, you can also just throw in some people you don't like to be murdered too, completely innocent of anything.
Trial is important, even when you know that the accused is guilty. The US had him there, unarmed. But they decided trial wasn't important to their moral code and prefered assassination, murder, revenge - that is a tragedy right there, to see the US's ideals exposed.
Nuremburg trials were held in a 1940s world where capital punishment was pretty rife. Yet despite that, some Nazis were given life imprisonment instead, deemed not to have committed crimes requiring the death penalty. Yet you would have murdered them all because you feel angry and therefore they were guilty of everything you could have thought of. That kind of thinking is to reduce society to barbarism worthy of Isis.
It depends where Bin Laden would have been tried but capital punishment has been dropped in many many places around the world because our moral attitudes have evolved to become more civil. So why would his death been inevitable had he been tried?
Where is the war in this situation that you talk of? There has been no war against terrorism - it is rhetoric to influence people's opinions and outlook on the following actions (sorry you fell for it..) but there is no war as is defined by things like the Geneva convention. Terrorism is a string of criminal acts, no matter how descructive. To hear someone sucking up United States's agenda-promoting distortions as if they are the thruth is quite shocking - I thought that was only done in the gun toting, republican south or the fringes of the internet.
The refusal to accept other people's corruption and amoral behaviour as the way things must therefore be done is NOT naievity. In fact it is naieve to believe you will be seen as strong and powerful by ordering extrajudicial killings as the US does and Cameron does.
The strong leaders who earn real respect around the world are those who insist on real justice to be done and especially those who resist calls for revenge and murder from uncivilised parts of society.