Did the White Star Line or a Titanic crew member (as depicted in films) really claim Titanic was unsinkable or make the statement “God himself couldn sink this ship?
No. It appears that no one from the White Star Line actually stated this officially. The press of 1912 reported the following after the disaster “…and they said she was unsinkable. But who was “they?” the press chose to not mention a source for this remark. The nautical magazine Shipbuilder, while publishing articles about the engineering feats accomplished in building Titanic, wrote “…and with Titanic’s transverse bulkheads and watertight doors, it renders this vessel practically unsinkable.” This is one possible source of where the media most likely twisted things around to say that the White Star Line made this claim. It’s called sensationalism or yellow press, and still happens today, unfortunately. Titanic author and historian George Behe has suggested (after researching this claim) that it is possible that this statement of Titanic being unsinkable actually may have begun after the disaster.