Which is to say, our military can be unethical, but us having a military is not unethical.
In a post-nuclear world, this is incredibly complex so it usually ends up playing out in different theaters (Korea, Vietnam, Iran, Syria, etc.) rather than the shores of the U.S. as you pointed out, but the total reserve and reach of that force is still just as important.
The argument can get slippery though when trying to justify allocating resources, because with deterrence it's hard to know exactly how much you need, especially when gaining that knowledge usually comes through defeat of some sort.
Much of Mexico's territory is de facto controlled by enemies of both Mexico and the USA, and Russia has, or at least is eyeing having, an outpost in the Caribbean right now.
The US used its army directly in the New World at least as recently as 1982, in the invasion of Grenada.
Or even more recently in '89 down in Panama.
Or in Haiti in '94 -- though that one wasn't necessarily an invasion but the troops were in the air if diplomacy failed.
It's hardly similar circumstances. An attack on the US mainland today would mean global nuclear war. It's highly improbable to ever happen.
So you're saying the US should have nuked Afghanistan? I think you have an oversimple view of international relations and military affairs.
Or enact similar immigration restrictions, like Trump did about a year ago.
I think there's a coordination issue here. Tech can be intolerant of views that don't align with progressive orthodoxy (doubly so in tech hubs), the DOD needs tech workers who are more aligned with their mission than the progressive techie detractors. Why don't some badthinkers band together and get a DOD contract? I imagine it's because the DOD isn't going to give a new shop it's first chance but has anyone looked into this?
If your military policy is to siege populated cities and villages, bomb amd shell them, killing thousands of people caught in the cross-fire in the process, that's what should be the focus, if you're interested in humane military.
That's already much more indiscriminate than some Google killer drone ever will be.
Sorry about your friends. That really turns my stomach. My son was an Army Ranger (FIST/JTAC) he said being in SOCOM gave them more ROE freedom. And, in the rare cases when things started to get sketchy bombs and missiles could be brought on target on the authority of the ground commander (company cmdr or platoon leader) no questions asked.
edit: a/an
These things will still be commanded by humans, and there will still be decisions made at some level wrt how many bystanders it's ok to kill in the operation. Just like with bombs, artilery, etc.
The only thing I care about is that we stop wasting trillions of dollars for the purpose of killing brown people.
Xinjiang is definitely under siege, with millions of people being placed in internment camps [1]. China's actions to date may be seen as a precursor to genocide, but that has not occurred yet.
1: https://www.washingtonpost.com/...million-uighurs.../2aa871d....
If we want our military's actions to be humane, we need to keep real people somewhere out on the front lines, and we need them to be well trained to defend themselves in the event of a real threat, rather than reacting inappropriately to a false one.