You skipped over my point. I think the activists let perfection get in the way of progress. I know that they're not advocating for coal, but by fighting nuclear they left no other scalable solution other than coal. Nuclear doesn't have to be a forever solution, but it's a perfect stop gap in the meantime.
Surely these activists contributed to progress on some other, smaller sources of renewable energy, but at the cost of decades of record breaking greenhouse gas emissions.
Nuclear could have put a halt to many if not most coal and natural gas plants until other sources of renewable energy improve and have time to get built out.