But what are the options? - Don't do anything AKA appeasement? Then Russia will keep on invading countries (Georgia Ukraine), fostering enclaves in other count

But what are the options? - Don't do anything AKA appeasement? Then Russia will keep on invading countries (Georgia Ukraine), fostering enclaves in other countries (Moldova) and maybe even annexing Belarus (who is one mistake away from that). Also, remember how appeasement usually worked in the past... - War? Then you end up with WW3 By depriving as many resources as possible for Russia, you are limiting the scope they have to keep funding their huge armies. Maybe it won't help that much, but it's better than the alternatives.