The Guardian: Germany to reach out to France and UK over sharing of nuclear weapons

According to the Guardian: “owing to its second world war past as the aggressor, Germany has committed itself to non-nuclear defence in international treaties, according to which it is banned from acquiring nuclear weapons, at the same time as cooperating in Nato weapons-sharing agreements.”
This matter is highly sensitive and very criticized. Germany, the WWII aggressor has nukes today. These are mainly tactical US nuclear bombs which are mounted on German warplanes (usual all from US production). They call it weapoms-sharing, as Germany, based on the technical specificities, cannot launch a bomb alone and needs the authorizations, codes and instructions from the US. Nevertheless, the nukes are integrated in the German army, just it needs the US to push also the button.
The critical question is: Germany should never have nukes, a historical consequence of WWII. Germany has also agreed not to get their own nukes in international non-proliferation agreements. But Germany has got a nukes-sharing with the US in the NATO framework.
Now, Germany, fearing that the US is withdrawing from Europe, wants to “share nukes” with France and the UK, to station French and UK nuclear weapons in Germany which shall be handled by both parties together. Again the question: is it appropriate to give Germany nukes after WWII? And is the “sharing of nukes” not just evading international agreements and non-proliferation agreements?
And finally, will the withdrawal of the US and the build up of more nukes in Germany not lead to a Euroshima, a nuclear war limited to the territory of Europe where the US stands aside?