Thank you Gary for inviting me to join this conversation.
My view of the issue is extremely simple. Russia, when it annexed Crimea and invaded Ukraine with a hybrid force (irregulars comprising volunteers and mercenaries) committed a crime. This crime is a threat to the member states of the EU - it undermines international law regarding borders and could potentially lead to conflicts within the EU. Russia is destabilising the Union itself by using deniable assets- politicians and others who are incentivised by various means including payments and loans via banks, oligarchs and media channels.
If the EU does not support the enforcement of international law in Ukraine it will face an increasing threat within its borders. Russia's aim is to splinter the EU and to sever the transatlantic alliance. So extending sanctions is morally justified and imperative for the security of the EU. In addition, the EU must act to secure the threat from deniable assets in particular the "red brown" alliance sponsored by Putin. Finally, all RU promoted narratives blaming the victim must be eschewed.
You touched on the relationship between the Soviet Union and Nazi Germany. I am a Londoner. My grandmother nursed my father (he was born in 1939) in an air raid shelter. The Nazi bombers that were dropping those bombs on London's civilians were flying with engines provided by Stalin's Soviet government. And that was not the only help the Kremlin provided to Hitler.