The word “sanctions” just describes a set of decisions that a sanctioning country can make. Any country is free to make any decision it wants to. If one country doesn’t like the decisions that another country makes, they can sanction them whereby the sanctioning country makes decisions about how it’s going to interact with the sanctioned country and typically how it will interact with other countries that also interact with the sanctioned country. The effectiveness of any sanction is determined exclusively by how much other countries want whatever it is that the sanctioning country has to offer. Liechtenstein has every right to start sanctioning the USA if it wants to, but it would have to first assess what would happen if it forced the world to choose between it and the USA.

Not saying Americans are right to impose, but as a neighbor European and an Earth citizen I do believe it would be in our collective interest not to create additional pipelines to Russia, or anywhere else for that matter.

Germany should build some HVDC or regular long-distance transmission lines so they can use their wind electricity without routing through neighbors and build more wind farms.