From Trump‘s (questionable) world view, Finland is not an enemy. They heavily invested in their own military and didn‘t have a negative export balance with the US.
These are the two things he criticizes the most about the biggest countries in the EU.
Kind of ironic to read this. First, the UK decided to part ways to pursue their economic goals on their own.
Now that the US are doing the same, they realize how benefitial the EU was for their economy (even without Trump, they realized this).
GB perfectly demonstrated why the US way of thinking is bs. They regret it every single day and the US are too dumb to learn from others mistakes