Are they wrong though? proliferation risk seems to me an important point. Also are risk of theft, attacks on facilities and transportation, leakage due to natural disasters, and of course: bad politicians doing "unavoidable" cuts. Moreover, even with FBRs you get Pu-contaminated MSO (http://e360.yale.edu/features/are_fast-breeder_reactors_a_nu...).

Once you take all these issues into consideration you just need to extrapolate and see how nuclear accidents will happen once in a while.