Opel is Stellantis which despite being headquartered in the Netherland for tax purposes is controlled by Americans, French, and Italians.

There are no Germans on the board or in executive positions.

I recall Opel was owned by GM already before WWII? And iy was only relatively recently that GM got out?

(Ownership aside, Opel has been producing cars made in Europe for (mostly) Europeans for AFAIK the entire post-WWII era.)

Opel - the fastest rust in Europe. The only decent one were the later runs of Insignia and we all joked that the whole project was a failure because you could expect for the car to work straight out of the factory.