I wouldn't be surprised if the FF industry was driving this narrative, but I can also see it happening organically. A lot of the "green" people, especially in Germany are fanatically anti-nuclear. At the same time, the right-wing populists seem to have adopted the position that climate change can only be countered with nuclear power. I'm not sure why that is, probably because it's an easy answer and positions them against the green parties - after all, they cannot agree with their perceived enemies.
I think the German "green" case (to a degree) comes from the Chernobyl meltdown happening relatively nearby. It is in living memory for those power so it's understandable that they shy away from it.
I should add that meaningful advances have been made in nuclear power station design. But unfortunately these advances can't withstand other problems e.g. Russia putting operational power stations at risk as they invade Ukraine.