We have proven that we aren't capable of handling the responsibility that comes with handling coal/gas. And unless you live in a shack in the woods you're a contributor.
Nuclear is the only energy source where we have a 100% plan for the byproduct of energy. While I agree we really need to come up with an alternative. Nuclear may be the only short term stopgap that gets us off of CO2 producing plants in the short term so we can get to a long term.
No nuclear planet has sent our entire planet on a crash course with climate change... Every energy source that powers our lives has a trade off and a byproduct. We all need to admit that, accept it and then make a plan to live in harmony with as much of the earth as we can.