I would even go so far to suggest that it's more like the Rhineland or the Saar.
You would go so far to suggest Moscow is more like Nagasaki.
Yeah - understand that we're struggling over which analogy is more or less appropriate, but it's still an analogy. Putin is Putin, that we know. He is certainly expansionist, and adept at destabilizing a neighbor for his country's political gain. He does appreciate the advantage of a strong Black Sea port and the strategic importance of access to the Mediterranean - very much as Peter the Great did and many others after him. He has not yet displayed Hitler's rather bizarre fixation on race or any tendency to pursue it by industrial-grade extinction programs. He is yet to propose a world-wide Reich; rather his focus is strongly regional.
More to Johnson's point, certain actions and especially the reactions of the West do resemble the run-up to WWII: aggression against border states and a conviction on the part of a lazy and enervated Western leadership that negotiation is capable of any solution if one side is only sincere enough and infinitely malleable. That does not mean, however, that Putin's intentions are as sweeping as Hitler's or that war is inevitable because he won't stop until he gets one. It does mean that continued weakness in the face of this aggression is extremely dangerous. All IMHO and subject to vigorous debate as always.