Because in practice none of these things in any way deterred countries from using their military and covered assets to practice imperialism.

In a way some of the things you mentioned were essential for this modern imperialism like NATO(just as one example of many it was NATO equipment, intel and training that allowed Azerbaijan invade Armenia), economic dependencies(invasion of Venezuela started with economic sanctions), movies, culture and the Internet(more specifically corporate owned social media) used for propaganda and controlling public narrative.

I do agree though that there are anti-war and anti-imperialism trends in Asia(we recently got to see China and India leaders shake hands, that's very new and exciting), Africa and South America.

Wow. I see the first four or five things you mentioned as the primary enablers of "this sort of thing," if by that you mean the theft of resources and destabilization of governance in the global south.