The problem, as I think we can see clearly now, is that “keeping Germany down” in the long run requires the abolition of Germany, which is not really in the interest of the other European states, either, since Germany will be replaced by an Afro-Islamic state in the heart of Europe.
The abolition of Germany does seem extreme. However, perhaps the concept of uniting all the old German states in 1871 was not such a good solution. It was Prussia which was overrunning all the other states, and the final unification with Bavaria made Germany into a ‘super’ European state.
Bavaria remains distinctly ‘non-Prussian’, and has a less stern lifestyle/culture than the Prussian model. For that matter, So does the Rheinland. Allowing Prussia to grow through military strength and treaties was not such a good idea.