It is the other way around.
The German scholars of the previous two centuries fantasized about a ‘master race’. Scientifically, the existence of such a ‘race’ turns out to be complete and utter nonsense, and the notion that this ‘master race’ had a singular monolithic religion likewise turns out to be complete and utter nonsense. Today, German scholars reject the concepts of Germanic uniformity, and are far more cautious about the meager evidence for what Germany looked like.
One fact is certain. At that time, what is today Germany comprised many completely unrelated ethnic groups, tribes, and cultures. These Nongermanic tribes adopted a Germanic language for complex cultural reasons.
Moreover, the misnomered ‘Proto-Germanic’ language probably originated in Scandinavia, in the complex multicultural matrix in Scandinavia, when Proto-Russian migrants entered Scandinavia via Sweden.