It always surprises me when people ignore or discount the NEW Testament when talking about Christianity. Granted, the Old Testament makes for much better drama and thrills, but the "Love Thy Enemy"-Strategy works much better in the long run.
I fully understand how satisfying it must be to see this sorry excuse for a human being dead, but he is now considered a "Holy Jihad Warrior" as the Hamas called him. So, think about it: How much more satisfying could it have been, if the person and the idea of Bin-Laden had been proved to have accomplished NOTHING but bring suffering to everybody, his enemies as well as the people he, supposedly, fought for?
Why not help the societies he recruits his followers from, to develop so such a degree that the people simply stop listening to him and realize what a sick and evil person he had been?
Again, no immediate results, no Hollywood-material. Instead a lengthy, agonizingly slow process which may take generations for the hatred to slowly die out, but it surely beats the vicious circle of violence begetting violence.
I am not saying his killing served no purpose, but I doubt it will have any considerable positive effect of limiting terrorism worldwide. It may very well invigorate his organisation, instead.
Anyway, I may be too naive or too much a realist, but if you want long-term peace, you should be the first to stop using violence altogether, be completely honest to yourself and the people/societies around you, and do what is morally right. The Western world still has a long way to go in that respect...
The Bin-Laden thing may have been necessary to bring closure to many, but now one should honestly start thinking how people could even reach the point at which they believed flying airplanes into skyscrapers was a reasonable thing to do, and fight those conditions that made such madness possible.