These decisions were taken years before the conflict in Ukraine, and German energy policy at the time was largely predicated on Russian imports. Hence, peace and stability in Europe seems to have been an underlying assumption rather than something that was being hedged against.
For me nuclear power plants were already sore points in national security long before the Ukraine war. Terror targets in peacetime, hostages in wartime.
One way to put it: The entire safety record of nuclear power depends on no major war (compared to WWII) being fought around those plants and secondly nobody realizing ill intentions otherwise. There are ways to sabotage nuclear power, and we are betting a LOT on many societies' abilities to prevent or even predict every single one.
