Roger Waters is the poster child of this phenomenon of "lefties" and "pacifists" suddenly becoming authoritarian fascists/tankies when it comes to Russia/Ukraine. At absolute best, they are cowardly appeasers who should have learned from Chamberlain.
If you ever decide to waste your time debating these types, you'll find they seem utterly convinced Neville Chamberlain is considered a hero in the west, because one of their favorite arguments in favor of the Molotov Ribbentrop Pact is that they'll assume anyone who is against Stalin jointly invading Poland with Hitler thinks it was a good idea to hand the Sudetland to Hitler
