I know you're not a non-interventionist. And I bring to WWII primarily because it's the last time non-interventionists had any real influence. It's the reason they lost credibility.
And I don't consider the Russian invasion of Ukraine to be the same as WWII. It's too early to make that call, but keep in mind that most didn't one Hitler was going to lead to WWII either. Almost everything that's being said now to justify not helping the Ukrainians was said then. "Germany is weak. "Germany only wants control over areas that have a lot of ethnic Germans." "Germany isn't a threat to the United States." "We provoked Germany with alliances and onerous treaties and restrictions." "The Czechoslovakian and Polish governments have a lot of corruption." "We have more important things to deal with." "We're enabling war profiteers."
By the way, much like now, those criticisms all had elements of truth to them at one point or another. The point isn't that this is a prelude to continuing aggression. It's that we don't really know either way and won't know for sure until it's too late to stop it except through massive cost in money and blood. If we decide to let aggression be worthwhile, we'll very likely see more of it.