https://www.resetera.com/threads/why-are-democrats-and-liberals-so-often-pro-war-what-happened-to-the-anti-war-left-in-the-us.141942/#post-24668732
I've been an anti-war Democrat since I was about nine or ten years old. We still exist.

Democrats are "anti-war" so long it's the other party fucking things up.
Since that fucker has been an Anti-war Democrat since they were 9, they'd remember a time when Democrats like Michael Moore protested the Iraq War while Bush was president but for some reason forgot about it when Obama became president and the war didn't end. They'd make excuses for Obama drones with things like,"oh, but that means American soldiers lives aren't being lost."
Which tells you everything you need to know about American politics: it's a team sport. Not about actual values.
But it's such a brave stance to be anti-war. Just remember WW2 and how they tried to avoid meddling into european affairs. It's not like that fella Hitler had to be stopped. I wish the US never got involved. I am brave.
Anti-war doesn't mean you shouldn't ever get involved because that's simply not realistic.
It's about maybe not invading other countries to promote our values (Korea, Vietnam), usurping actual regimes and replacing them with puppets, and acting as an evil imperialist machine shooting drones at leagues of brown people abroad that includes man, woman, and child because of "terrorist lists".
You can't be like: I'm anti-war when I have been presented with all the facts postmortem. That's an easy call to make. Anti-war sentiments existed long before Korea and Vietnam, including WWI and WWII. Turns out most of the anti-war sentiment died when Hitler backstabbed the commies and they were like "hold up!"
What you describe is either anti-imperialism as nachobro says.
PS: Btw what I was saying is that the hands-off approach of the US on WWII was not good for Europe. In hindsight, we can all agree to that. However, if they actually intervened we'd have scholars saying how the interventionism of the US left Europe in a sorry state.