This is the correct answer. There were upcoming elections, and the acting government was afraid of loosing votes to the Greens due to the shift in public opinio

This is the correct answer. There were upcoming elections, and the acting government was afraid of loosing votes to the Greens due to the shift in public opinion. The decision was made, nobody wanted to reverse it. Additionally, it turned out, that the extension was unnecessary while costing millions. The fact is, that nuclear in its current form has no future. It's too expensive, takes too long to build, and it's unpopular. Maybe SMRs or other new forms will change that in the near future.