-Cost for a 100000 years mainenance of the waste was never in calculations when people argued prices
It's folly to claim that the "waste" that is 95% re-usable won't be reclaimed well before the "100000 years" that you claim it is dangerous. The only reason so few countries have bothered with reprocessing said waste is because it isn't economical right now, and it's actually dirt cheap for us to store it since there is so little of it. As uranium becomes harder to find in a few decades, do you honestly think scientists and engineers won't be looking at the spent fuel and say "hey, I bet we can reprocess that economically"? Side note: once reprocessed and run through a reactor again, high level radioactive waste is only dangerous for ~300 years. Surely that's manageable, compared to fossil fuels that dump poisonous gasses and heavy metals into the atmosphere at thousands of times the quantity that do not decay.
-90% of German (or American) plants would not withstand impact of a plane bigger than a Cessna.
In that event, what would the damage be? I'd imagine the worst case would be a plant that is incapable of running again and cost quite a bit to clean up, so it would be an economic disaster for the company that runs the plant. But would anyone be harmed outside of workers at the plant? Psychologically, maybe, but physically no. A much better "use" (in terms of damage/effort) of a terrorist hijacking a plane is to aim it for skyscrapers and highly populated areas.