Military casualties are the price of empire, and since members / citizens of the empire benefit from the global actions of the military of the empire, us in this case, often without any awareness of that fact, if you like the benefits, like wealth, enjoying a relatively stable fiat global currency, the US dollar, actually earning a living wage when you work, and easy access to material resources etc, access to cheap petroleum to get you to the trailheads and work, paid for with debt the world has to buy because there's no plan b at the moment, and the freedom/luxury to worry about the weight of ul backpacking gear etc, then you should be grateful for those who fight to maintain the empire and the benefits that flow from that. You know the idea, sort of like the protesters who drove up in cars to the 'no blood for oil' demonstrations, never seeing the irony in their actions, etc. I'm not a fan of empires but I don't pretend I don't live in one and that I don't benefit, so hats off I guess.
It's also worth remembering that empires fall, particularly when they do the typical things that they do as they hit their apex and start to disintegrate, then lose the ability to provide their cores the above benefits, which is roughly where we are now. Making friends is however a better long term strategy than making enemies, just ask China and watch what we do vs what they do globally. It's also, oddly, far cheaper, and more cost effective, but doesn't cater to as many entrenched interests, which are of course another reason empires tend to break apart, they get too corrupt.