I wouldn't say that the American public at large seems perfectly fine with it (or they wouldn't allow it.) That's a very broad brush you're painting with. A large proportion, probably a majority, don't like what's being done with our military. We tried to get Bush Jr out of office after his first term, and that was a very close election with just as much evidence of vote tampering as the his first election. Obama was overwhelmingly elected because everything thought he would do things differently and restore our standing in the world, but that's turned out not to be the case. His reelection was much closer, and he probably only won because his opponents were so weak.

After all these years, I think the American public has largely given up on their votes making any difference whatsoever; President, Senate, House of Representatives, they mostly all do whatever their financiers want once they're elected, public opinion be damned.

Anyone want to come in and liberate us from our corrupt government? (I was going to say tyrannical, but I don't want to devalue that word; we're not there yet.)

What the U.S. does is to use military force to preserve the international status quo. E.g. if we go into an oil rich state like Iraq, we don't just take the oil, we just ensure that it continues to be sold in the market as usual. This isn't "war" but it's not "conquest" either.

Don't forget that we can also just ignore it or have it hidden from us. In that case it happens without us being for or against it.