The green movement has two roots, one is the worry about global warming the other (and much older) is about pollution/ecology and in some circles new age/hippy pseudo religion
The latter has always been opposed to nuclear and the former converged into it because until relatively recently they were the only ones listening
I'm not saying it was smart (it wasn't) but it's how we got here
The anti nuclear power movement in Europe was also pretty strongly influenced by Soviet info ops. The Soviets badly wanted to sell natural gas to Europe, because it was one of the only products that the Soviet Union was competitive on in the Western export market.
Nuclear was, in the 70s, looking like potentially a complete replacement for gas, as it almost became in France. Slowing down or stopping nuclear in Europe was a big priority for KGB active measures.
Are you the kind of person who doesn't understand the difference between "tries to influence" and the obviously much stronger "pretty strongly influenced" claim the above commenter was making?
Or who thinks: "Okay, so we've been hearing a lot about the FSB and attempted election meddling. So if someone on the internet makes a spurious claim about an amazingly successful operation the KGB supposedly pulled off back in the 80s -- heck, why not just believe that also? Even though apparently nothing has been ever been written about it; and in fact what they're saying runs counter to direct observation of events at the time."
It's not "supposedly", there:s plenty of evidence of Russian troll farms online pretending to be Americans trying to influence elections and denigrate Ukraine online.
And regarding gas and nuclear, Plenty of EU high level politicians from Germany and Austria were close to the Kremlin and after their mandates were over took well paid positions in Russian oil and gas companies being proof.
What part of this logic makes you think that Russia couldn't have anything to do with pushing the anti nuclear agenda on Europe in order to maintain EU dependent on their gas that you need to be spoonfed precise proof? It's not like the FSB publishes their dark ops online or that western counter intelligente Tracking FSB ops publish their immediate findings. But various journalist do make educated guesses on this without the "we did it" explicit proof.
So please be so kind as to use Google and your brain before demanding "source pls or it never happened" for every little thing.
There's also the third branch of anti-capitalism-first, who only care about ecology insofar as they can use it as an excuse to get on their soapbox. I'm really not trying to be sardonic, but there certainly is a tribe of green activists who demonstrably have no actual interest in the environment, just in insisting that the only solution to any problem is economic revolution - sometimes to the extent of actively sneering at and opposing practical, immediate measures to improve the situation (and green politics is not the only movement where they do this)
That eso stuff ends way to often in nature purity ideology which is close by a hair to racism. I never understood why that ideologic "field" escapes all scrutiny and is considered idealistic and good by default. They can yell for genocide on the poor via foolish agrarian policies and nobody bats an eye.
The latter has always been opposed to nuclear and the former converged into it because until relatively recently they were the only ones listening
I'm not saying it was smart (it wasn't) but it's how we got here