“Smoke detectors contain about a millicurie of Americium.”
Sure, but even the manufacturers must be licensed to produce such devices and are regulated as to their manufacture. That smoke detector company has loads of red tape to cut through to produce and bring their products to market.
You don't find labels like that on just anything.
Focardi has laboratory privileges at a university which has everything Italy requires in the way of radiation controls. The US Federal government does not regulate that lab.
Rossi has been working with Focardi all along IN ITALIA.