So Stop the War don't support the ordinary people in Ukraine, under fire in a war, right now?
If that's the case - given that this meeting is called Stop the War: No to War In Ukraine - they need to be clear, because there are well-meaning people out there who'll want to get on board with an end to the war in/on Ukraine, to support civilians there, and they deserve not to be misled by people who are slagging off Ukrainians, don't recognise their right to exist as non-Russians, and don't recognise that they are under fire from Putin and his cronies.