So an ally is irrelevant.
People wonder why the EU is built the way it is, and behaves the way it does. It's precisely to avoid this. To bind Germany and France together and avoid the big powers treating smaller neighbors like this. I guess that's bad to some people.
This is not a trade dispute over something signed last summer. It's a lot bigger than that.
[1] https://en.wikipedia.org/wiki/List_of_countries_by_foreign_e...
The fact that the DoJ is not an independent institution unlike in almost every other western country makes it impossible to uphold the law if the white house doesn't want to. The only thing preventing a sitting president from going after his political enemies is a "gentleman's agreement" between administrations in the United States.
Stability it key and there isn't any as we can see clearly.