A fleet of 1,700 were built as passenger planes before Hitler ordered their conversion to bombers.
This is unfortunately a complete nonsense. There were probably less than 1,700 passenger aircraft worldwide in 1939. The Dornier was too small a fuselage for passenger use, and pre-war Lufthansa didn't have any in its fleet, its principal type was the Junkers 52/3m. The only Dorniers operated by Lufthansa pre-war were a small number of flying boats.