Judy Wood is disnfo of a particular sort. I believe that she just started out with good intentions and the wrong idea and therefore got support from "Them". I detect from her behavior that she's now aware of this situation, but will never correct herself because her career will collapse into dust if she does.

As direct evidence, she denies that there was any excess heat at the site. I guess she missed the pools of molten metal, fires that would not go out, and melted shoes.

Look up the work of Dimitri Khalezov and Heinz Pommer for a very full account of the nuclear destruction.