Importing gas from the US looks difficult given how polluting cargo ships are and the complete lack of capacity.
Importing gas even with the pollution associated with shipping it in is still better than burning lignite; which actually affects the health of lots of people in Germany and France (depending on winds). That's what they are trying to get rid off in the next eight years or so. Shutting down coal is the number 1 priority as it is by far the most polluting. If they could have done that with Russian gas that would have been better indeed. But that ship has sailed. Shutting down gas becomes the next priority after coal has been removed as a source of energy.
You keep on dragging in Trump. I'm not sure what your argument is other than that he did not do anything productive here other than promoting coal; which I would argue is indeed pure lunacy. Capacities can be scaled up if the price is right.