I think that having oil & gas pipelines with the RF is not really a problem. This should have brought RF and EU's interest close together and Adolf Putin could have chosen to be a civilised nation with a positive influence in the world. I guess a former KGB mediocre bureaucrat cannot avoid being what he is.
Unfortunately it becomes a gateway drug to complete dependence on Russian (or Saudi, or some other totalitarian shithole) energy resources. Yes, a pipeline could be built while keeping viable backup options but ten years later a different party gets elected and says "why do we need to spend billions maintaining LNG terminals when we have this cheap gas flowing through the pipeline" or "why do we need the nuclear plants or solar or geothermal or anything really except cheap natural gas power plants" etc etc.