Some parts of anti-nuclear movement hold a position "ban nuclear no matter what". But for example, what happened in Germany, is nuclear plants being replaced by coal and gas plants.

Then discussion moved to if nuclear plant will be replaced by coal plant, is it really that better in the end? When faced that question, it was observed that anti-nuclear movement splits, where one side thinks that nuclear makes sense to stop coal, while another thinks that we must ban nuclear even if whole planet will die from climate change.

This is why, at least in Germany, some parts of anti-nuclear movement can be perceived as somewhat radical.