How? Oh please remove the blockade, we'll be a good girl from here on? Yeah sure. You think they would even let it get to the stage when harbors are mined?

The only realistic and safe course of actions is for the West to get their shit together and start very gradual decoupling. This will of course be reciprocal and the end result will be multi-polar world with ever changing alliances.

And after a while the trade between "enemies" will resume again and the circle will continue.