Just in case someone asks you, German and other European countries imported gas from Russia to strengthen the connection with business. In principle that was a good idea, countries which work together, and especially countries which work a lot together, normally don't fight each other.
Obviously, things didn't work out. But that doesn't mean the original idea was bad.
Over time relationships change, that's normal. "The west" is since a long time not "the west" anymore. There are huge differences between Europe and the USA. Until now people saw the differences and still decided to work peacefully together. And now? Now Trump takes a sledgehammer to those relations. Is that a good idea? Certainly no!
Trump could have explained to Europe and especially Ukraine that they don't want to continue like until now. Ok, accepted. Then let's work on a new relationship. And not destroy the existing one with a sledgehammer and look what happens.