Trump is inherently malleable. North Korea, Mexican wall, trade war with China, New Cold War with Russia — and now, Venezuela — what Trump says he’ll do isn’t necessarily indicative of what he will do. His decision to transfer the problem to the UN SC under the circumstances is eminently tactical.
The norms of Public International Law and doctrine of collective security after 1945 did not stop different forms of armed interventions around the globe but especially by the US – a country which became a global champion of aggression. Armed “humanitarian” interventions are still and are going to be a reality of the present and future international relations under the umbrella of the R2P.