Is anyone really surprised that Russia is stopping natural gas shipments to Ukraine and the EU? They did the same thing three years ago, in a cold spell. They used the same rhetoric, saying that Ukraine was at fault for stopping the flow of gas to the EU via the pipeline that runs through Ukraine. The BBC reports by country on how the EU is coping with this reduction in Russian natural gas supplies.
If this isn’t a good reason to diversify supply in the short run and reduce use of energy in the long run, I don’t know what is.