Germany are certainly a weak link in the west due to their reliance on Russian fuel and they know well what happens in European land wars against Russia from bitter experience.
I'm interested in how EU candidacy is sold this week - could be very telling.
Ukraine should really be told an honest no, that it isn't in their or the EU's interests to do this now.
In terms of the 20th century war comment I think the Germans are more right than we are - you can have a few high-tech weapons systems but you also need numbers, firepower and the ability to hit the other guy before he can hit you plus in the EUs case it needs to work as part of a team (including a non-NATO team in case Trump gets back in). I hope therefore that they go down the route of interoperability, more men, more and better artillery / armour and bigger reserves of ammo. An
effective defence force of 500k - a million (and bear in mind they have circa two million now, albeit they aren't so effective as a cohesive whole) is going to deter Putin far more than any sanctions will.
I also think they should seriously think about what a pan-European communal mass civil defence force would look like and how it would work; maybe not going down the road of "every man gets a rifle" but giving the citizenry a role to play in the event of disaster or war is much better than abandoning them to whatever, and I think that is one of the lessons from this war (and the pandemic fwiw) so far.
We should also be doing all the above too of course, but Johnson isn't. We are nearly four months into this and they've still not reversed the cuts of the 2021 review.