I'd give your comment the tiniest but if credence if you had the data to quantify it, but 2/3 of your examples don't think that kind of information should be shared.
Basically, you're forming an opinion based on incomplete data.
The attitude toward wars displayed by countries that have never in living memory fought one on their own soil is frankly terrifying in its stupidity, though.
The last military power that was stupid enough to put on uniforms and march infantry onto American soil was the Confederate States of America. How'd it go for them?
America's attitude toward war is "If we're going to fight, it's gonna happen in your face, not mine."
I'd say it's more like "we will only fight if we can keep it off our lawn and avoid tracking in the mud". America didn't dare fight 1939 Germany, only 1944 Germany when the war was already decided, and the real pivotal battles have already been won. It didn't dare fight the Soviets when they took over half of Europe, and it didn't dare fight the Soviets directly for the next century, and it "won" the Cold War by default, only to be coopted by Russian intelligence just recently.
I'm not saying it's a bad thing, but it's so weird having grown up in a country that has really known war, and to talk with Americans who think fighting a war is anything glorious.
And "every blade of grass" is reformer bullshit by the way, just to keep with the community theme. Unrestricted war crimes, nukes and chemical warfare, drones and stand-off munitions eviscerating clueless people. That's what war is about.