There is a difference between killing military opponents and killing random civilians, robomatic.

But when you're engaged in killing random civilians to make a political point, how the bomb is delivered is not all that significant to the reality of what is being done. And the truth is, that is what has been done in our name.

And that isn't to say that the people who blew up those bombs in London weren't engaged in an act of cruel and vicious murder, because they were. And the fact that they aren't the only ones in no way changes that.
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That link I gave to the London bombing pictures on flickr - they are best seen as a slideshow, which you can do by pushing "View as slideshow" on the flickr screen. Seeing those shots of Londoners standing in the three minutes silence, taken by a whole bunch of strangers, adds up to a very powerful experience. I urge people to take a couple of minutes out from squabbling to share it.