Nazi attempt to control tobacco

Devra Davis claims that there is some sort of conspiracy to suppress knowledge about cancer prevention, and writes:

During the Nazi era, the Germans tried and failed to enact stringent policies to control tobacco. Their conquerors, despite having full access to German research on tobacco, didn't even try.

Usually people cites the Nazis as an example govt overreaching. This is someone arguing that the Nazis did not go far enough to control the Germans.