Sensationalism, the material released is not harmful
People hear "radioactive" and they become hysterical because they don't understand that there are different types of radiation and that the dose is important. The anti-nuclear energy people will never have their minds changed because science is hard so they prefer to remain willfully ignorant.
One of my best friends is a nuclear physicist who works at LANL and specializes in medical physics and nuclear proliferation. The anti-nuke zealots will even try to argue with him despite their significant knowledge gaps. Enviro-mentalists literally trying to tell a PhD in that field how radiation works based on their wikipedia-level knowledge. It's absurd.