The question is, is the current landscape in Germany an adequate habitat for a predator that claims large territories? Last time there was a native wolf population in Germany, there was no Autobahn, no large corn fields for bioethanol and ground-breeders had plenty of cover in the shrubs between small parcels of land. The drastic changes in land use are one of the reasons Germany now has a growing wild boar population again, where in the 1940s large areas had no boar at all. Boar hunting is more effective than ever (night vision, cameras, etc) but can't offset the exploding food supply.

When wolves return, we're not going to get some romantic version of fairy tale wild nature back - Germany doesn't have large enough preservation areas for that to happen[1]. Anyone who claims to be able to predict the future of wolf in Germany is just full of it - both sides of the debate.

[1]The Dutch Oostvaardersplassen is one example of what can happen when you naively try to turn tiny areas into a "natural wilderness habitat".