Of course. If anti-war activists achieve their goal, Russia will withdraw from Ukraine. Then, NATO will set up bases there, including nuclear weapons, in the most strategically relevant outpost at the Russian border. This, of course, will allow NATO to easily defeat Russia, the largest military power barring itself. Unopposed, it will take on China, the only real contender to the US on the economic front. This will eventually result in the US keeping its hegemony for the rest of our lifetimes, which by simple imperialist logic is detrimental to current global South nations. So as much as I dislike authoritarianism, those activists don't know what they are doing (or, worse, know it damn well) and stopping them by any means will help the rest of us.