Building new nuclear plants is pro-nuclear. I said green movement is not anti-nuclear but I didn't say it is pro-nuclear. World is not black&white.
Also, there are certainly green activists against ALL nuclear. I don't have a formal survey handy, but based purely on the opinions of those that I know, far more are anti-nuclear than are neutral on the matter.
IT IS NOT. Refusing new nuclear but understanding that current nuclear plants can't be shutdown (yet) until there's more renewable replacements for energy generation is a good compromise.