The war in Ukraine remains us of one thing: You don't want unpredictable things to happen around a nuclear plant. Nuclear power can be relatively cheap. If you subsidize it heavily. If you scale it up (and thus the risks) to drive down costs. If and only absolutely nothing goes wrong. No unforeseen natural catastrophes. No other "impossible accidents" of the kind that keep happening. Absolutely no possibility for ill intentions...
Stopping the import of Russian gas now instead of allowing more time does absolutely nothing for Ukraine except for a little bit of moral support, while tanking the German economy. Russia is already in a downward spiral.