Sure. You're right. So you have 2 theoretical worlds

1. There is no system, America does what they want because they're the strongest evilest ever
2. There is a system that we agree on and that defines what is lets say "polite" and "impolite".

By arguing about the "realpolitik" of it and the "akshually there's direct Involvement from Americans" you're arguing in world 2. By arguing about how the US does what it wants you're arguing in world 1.

My point is that by arguing in world 2 and agreeing to the Russian points, you must also agree to their consequences in that by agreeing that America has direct involvement, and North Korea having direct involvement gives America a rightful cassus beli.

I don't disagree with your point at all. All I'm saying is that you either need to agree to a system that may have side effects you don't like / don't support, or you need to agree to might makes right and there's no real argument that America "cannot do these things".

In short, tell me why this matters, you can decide the terrain and I'll conceed a fair amount of points, but you just have to accept consequences. World 1 America does what it wants, the question doesn't matter. World 2 if we're taking your argument at face value that the Russians are right, America is actually a direct party to the war, which means America can rightfully drone strike Pyongyang tomorrow

My argument here in general is that regardless that America has the biggest swingingest dick in the room, doesn't mean that other countries aren't all also swinging their dicks, and we have to make sense of this somehow otherwise there's no point and America should just win because it's the biggest evilest guy.