The reason Mao helped Pyongyang still applies: namely, it would make China less secure to have on its border a regime allied to a great power other than China.

They already have a border with Pakistan and got exactly zero problems from it (if anything, China is the one to stir up shit on that border). You seem to be repeating Putin-style propaganda points. Stalin and Mao were never threatened by the West really, that was part of the Marx-mandated global commie land grab.

Saying "The West is no threat to anyone" at the same time you're advocating for an invasion and abduction of a country's leader is certainly a position to hold. Not a very internally consistent or convincing one, though. And I suppose Vietnam never happened in your constructed reality.

>Stalin and Mao were never threatened by the West really

Before he became General Secretary, but while Stalin was a high government official, the US, Britain, France and Japan literally invaded Russia:

https://en.wikipedia.org/wiki/Allied_intervention_in_the_Rus...