You mean how to undo nearly 70 years of indoctrination?
We have a state television that is so influential that it is considered impolite to call somebody between 20:00 to 20:15 because that is the time the Tagesschau, the primary "news" source for Germans, airs.
It can be done, but unless they do another major fuck up like the refugee crisis, it's gonna be a really slow progress.