They don't need to restrict access by Google search domain. They can do it by search IP geolocation. Thus, if you're in France, you won't see the result from any Google site, but if you're in Germany, you will see it on all Google search sites.

I agree with them that worldwide banning is troubling, especially if there is open door for any country to ban anything from any other country.

Let's not forget that deleting something from Google doesn't delete it from human memory, the source website or mirrors it might have, and from other search engines. What gets on the internet tends to be resilient to deletion. Google can only do so much and they didn't write the content in the first place. They are just infrastructure.