Its not just about U.S. withdrawing, I think his message is that everyone who breaks international law should be held accountable and respect international sovereignty of nations. International bodies like the U.N. have done a shytty job of spreading accountablity to violations in international law because the of the leverage that the 5 permanent members have on the world. Your worries about the power the unchecked power that those three countries might have is seen through the lens in which the current international system of governance works. I mean your worried about Iran's influence but said nothing about the influence of a country like Saudi Arabia who we fund and are the biggest destabilizing force in the region. Why not worry about them? Because we have a relationship with them? Israel is breaking international laws with regards to their indefinite occupation of the west bank and annexation of West Bank territory. The current world order is already fukked up.
I'm not disputing the high minded goals, I'm disputing the notion that the us is standing in the way of that and I'm disputing the notion that the regional powers are more likely to follow those stated goals
The us is under more pressure and more likely to follow and enforce international laws than China, Russia or Iran
Saudi Arabia is an enemy of the United States and an enemy of the progress of human civilization, Israel should stop occupying territories
But again the us withdrawing from those situations would not make the situation better and the regional actors are not more likely to follow Chomsky's lofty agenda
The un does a shytty job of enforcing international law because the un does not have a military to enforce international law, it has nothing to do with how many members sit in the security council