“ridiculed as “crazy” by the nuke industry because his medical studies and radiological expertise revealed that radiation is harmful to human health.”
Ridiculed as crazy because he was always proven wrong on effects of low level radiation.
E.g. John Goffman (”The Father Of Plutonium) . What we find is that "Later in life, Gofman took on a role as an advocate warning of dangers involved with nuclear power." We also learn "Gofman was instrumental in inducing the health physics scientific community both to acknowledge the cancer risks of ionizing radiation and to adopt the Linear No-Threshold (LNT) model as a means of estimating actual cancer risks from low-level radiation and as the foundation of the international guidelines for radiation protection."
I think that Marie Curie already had acknowledged the risks of ionizing radiation as a result of her health issues working with Radium and Polonium, and it was never under serious question.
And there we have it - he proposed the LNT model to estimate the effects. Well bowl me over with a feather. Yes, of course, when you have nothing else the linear model is the first thing you use to estimate anything. Distance of a falling object - you use a linear model - which you discover is wrong, but you have to start somewhere. But just because a "brilliant" student of Glenn Seaborg's proposed the linear model is not a justification for the linear model and does not relieve anyone of establishing a scientific basis for it.
And he was not actually the father of Plutonium. Seaborg was and no one argues otherwise.