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I must have missed the democratic discussion about private businesses assisting in killing people at all, a duty traditionally exercised by states.You missed the "using their stuff to" part of that quote, the opportunities for melodrama here are fewer than you might've hoped.
In some way every service you could offer anyone is part of the war machine. When you operate a daycare, you're taking care of somebody's kids, and that somebody either does something for, or is involved with the military. One of the actions typically carried out by an active military is killing people.
Somebody is always using the products of your labour, in some fashion or level of abstraction, to kill people in whatever way their outfit, organization, or mandate deems appropriate.
And if we're to be more honest about what's going on here, you could just as easily say that Google is helping the U.S. government not kill people they never intended to kill. Also, I think it's rather reasonable to assume that the U.S. government's interest in continuing the drone program, or the military operations it replaces, is largely independent of Google's willingness to help them with targeting, which to me indicates that Google has something of a moral obligation to help make that happen if they're called upon to do so.