Brexit has shown that the core of the EU might become unstable.
The imperialist neolib alliance being destroyed would be good for literally everyone in the long term except maybe the French and Germans. Edit: it would probably be good for the French and German proletariat in the longer term too.
France, Germany, and Poland wouldn't go to war just because the German government said that Russia isn't the devil.
What are you talking about? It's been 50 decades.