How do you know it's made up? None of the involved countries have blamed Russia. Reuters and the washington post have also reported on this. It is not exactly wild speculation.
20 karma · joined February 10, 2023
Ukraine's strategic cornerstone is international relations, without which they cannot win the war.
Ukraine would never risk upsetting Germany, the EU's biggest economy, with such a drastic operation.
Many people already speculated it was the US, because Biden himself literally says "we will bring an end to it": https://m.youtube.com/watch?v=OS4O8rGRLf8
With a smirk. Even when pressed how he is going to do it.
For me, Hersh' story is the secondary corroboration.