IMO this is the laziest kind of fearmongering. There's nothing wrong with being skeptical of government claims, especially ones that are unverifiable to the average person (are there WMDs in Iraq? Who killed JFK? What happened in the Gulf of Tonkin? etc). However, this is not one of those unverifiable things. You can get a geiger counter on Amazon for less than $200.
It seems, well, socially irresponsible for the Physicians for Social Responsibility to make statements about radioactive contamination that contradict both government and independent tests.