That debate has been going on as long as the EU has existed. Some would prefer a stronger and more centralized EU, while others prioritize national sovereignty. As long as the member states are sovereign, it's basically guaranteed that some of them will pursue opposing policies.

Ditto. But that would require functional European leaders - a species which was pretty much extinct by 1975.

Are you seriously suggesting the major governments of Europe aren't united against Putin's aggression?

The only government conceding to Putin appears to be the one leading the USA!

Or front yard.