> strangely very friendly to Russia on all other matters
This "friendly" policy is basically not considering what Russia does within its borders justification for military action. This was always the unofficial policy, with the new bit being the Trump administration doesn't pass moral judgement on what Russia does within its borders.
A pipeline between germany and Russia strengthens Russia (increased GDP, increased control over the EU) and weakens the EU (which is full of countries that have proven they cannot defend themselves). Increasing the chance of war with Russia, and creating another mess for the US to clean up.
Seems pretty consistent foreign policy to me.