It was Nazi Germany, not “the West”, that invaded the USSR. The West, insofar as that means anything, was fighting on the other side - alone for 2 years, while the USSR had signed the Molotov-Ribbentrop pact.

The rest of your analogy is also weak. We haven’t armed one side in a drug war (eh?) NATO membership has not even been realistically on the table. As for the West “doing whatever they want”, can you give some examples? My impression was that eastern European countries were keen to join the EU, not that this was imposed on them. And once in, they have very much forged their own path, often to the great discomfort of Western Europeans (eg in Hungary, Poland).