The bringing of North Koreans into a conflict the Russian army has been unable to win breaks all civilised conventions and ensure genocide in Ukraine. NATO would still be reluctant to get involved but the UN can call a Special Military Operation and at the same time arrange for the veto to be removed from Russia, a terrorist state.
Can we sit around and see Ukraine destroyed. If we do the processes we now see in the Near East will find their way into Europe, and elsewhere.