Although the more conspiratorial among us would believe this was the outcome the US wanted, hence attempts to bait Russia into a conflict, it is a bit surprising Germany has taken such strong action when, essentially, Russia probably hasn't yet overstepped the mark in terms of resolving this diplomatically.
Very unclear if Putin is playing 4D chess or if yesterday's press conference was a Kevin Keegan-esque heads gone and he has completely miscalculated the situation.