This rule has held true my entire life so far, and has probably been true since the 1940s.
Although i definitely know people who are pro-Palestine and pro-Ukraine and its like uhmmmm lol
Name a time after world war 2 where the US was justified in a military action in another country.
Considering the motives that drove us to finally join WW2, I’m not even 100% comfortable calling the US justified there.