Pre-emptive assassinations??!!
Why not? We're in the business of preemptive wars, costing many lives. I don't necessarily think that is wrong, I just wish we would go in and remove the threat to the U.S.A. and get out. I could care less about nation building. We're hated anyway, let's give them something to hate us for.
I also don't think you are doing your enemy a favor by restraining yourself to the point that when you do have to react, you are forced to react to the point of wiping them out completely. This is what happened in World War II. A more merciful response is to eliminate the threat early, saving your enemies lives as well. We've tried everything else at the cost of much bloood and treasure, why not try preemptive assasinations? What's morally more right, to kill one, or to kill thousands, even millions?