Der Schlüßel zu dem allem ist wohl Merkels Oma
Angela Maria Raubal.
Hier ein Auszug aus ihrem Lebenslauf:
"Geli was found dead in her bed on 9/19/1931 with a bullet through her chest and Hitler's gun by her side. "A mysterious darkness surround the death of this unusual beauty," the newspapers wrote. Whether the death was a murder or suicide has never been resolved. There was a hasty attempt to cover up the death with the announcement of suicide "that she was nervous about an upcoming recital." The Munchner Post wrote that "Herr Hitler and his niece had yet another fierce quarrel." The report continued that the 23-year old girl wanted to go to Vienna, where she intended to become engaged."
https://www.astro.com/astro-databank/Raubal,_Geli