Covered here and here. It should surprise no one that Russia would do this, as realist theory predicts this behavior. Gazprom’s profits need to be protected, after all, and those profits would not be protected if Europeans were allowed to engage in hydraulic fracking. But just because the allegations against Russia are not surprising does not mean that they are any less alarming. As the stories I cite note, Russia is using soft power in Europe to expand its own strategic interests, and it is doing so at the expense of its neighbors. The neighbors in question are obliged to fight back in order to protect their own interests and in order to curb Russia’s hegemonic ambitions.
Incidentally, what is American policy vis-à-vis Russia? Do we even have a policy?