I know what you're saying bud, so please don't see what I've said as a personal attack, it's not. What I'm saying is that killing someone for your own ends, whatever those ends may be, is the same thing. There are plenty of people I'd happily be a trigger man on, but I accept that ultimately it's a morally corrupt stand-point.
Arguably a lot less people would've died in World War 2 if we'd all just sided with the facists instead of fighting with them (And a lot of people got very, very rich from that war). Remember at the time the equation didn't involved holocausts & what not - that was one way in which the nazi's funded their ongoing war-effort after all. Therefore arguably the holocaust may have never eventuated. Then remember that out of the ashes of WW2 the Cold War started a lots more people died - does this mean we shouldn't have fought the Nazis? Not IMHO, but it doesn't change the fact that a ****ton of people died (Arguably unecessarily) as a result of the decision to fight them.
The trick is, where do you draw the line? Who decides which reasons are 'justified'? In some cultures it's acceptable to stone people to death for a plethora of reasons, in my eyes and your eyes, these things could be absolutely unjustified. Hell in India women get acid chucked in their faces for things as trivial as another man looking twice at them.
I think if most people were honest they'd happily clip some random person on the other side of the world if it made them a million bucks and would go through the rest of their lives blissfully ignorant of the destruction they caused to serve their own ends. That's why drug lords exist. I'm sure none of them have to strap too many detoxing heroin addicts to a bed in their lives.
My point boils down to; it's all relative to circumstance.
If you had a hundred million in the bank methinks you would quite readily go, "**** your stupid button, I would never do such a thing."
If you were homeless and unemployed though...
All 'civilised' society is only ever three meals away from anarchy as they say.