Re: Disgusting. Real people.
The author is merely describing how human targets are regarded by the owner and operator of the killbots, i.e. Uncle Sam. The US have a time-honoured tradition of treating anyone who isn't American as inferior humans. They also have a long-held policy that states that those who aren't with them are against them.
So, if you happen to have the misfortune to be non-American and disagree with US policies as well, you are in Uncle Sam's eyes nothing more than a juicy meatsack good only for target practice.
On the other hand, if you don't hold US citizenship but love licking Yankee boots, i.e. you're an ally, then you are considered a step up from pond scum and barely tolerated. Of course, if you're part of the Coalition of the Killing, I mean, Willing, then you get a pet on your head for your loyalty and dedication.
Indeed, as recent history has shown, even allied troops aren't worth much more than meatsacks. The families of British and Canadian soldiers shot by US troops in numerous friendly-fire incidents are still waiting for answers that will never come. Time and again, the US government has stalled investigations, withheld evidence, and refused to extradite the perpetrators to face justice. The same goes for their Iraqi serfs.
Human beings as meatsacks: Disgusting? Sure. But it doesn't make it any less real.