That whole Angela/Hitler stuff seems to me to be pretty out there. She was an East German functionary. They Soviets hated Hitler more than anything in the world. I doubt they would have protected anyone in his bloodline.
The bloodlines have had enormous influence over the Soviet Union from its very inception. In fact, the Russian Revolution could not likely have succeeded without the financial support of western bankers. Q15 claims that even to this day, Putin is controlled by the inner bloodline families.
I could definitely see the cabal putting one of their own - someone who they could control - into East Germany as a mole. It’s conceivable that the Soviet’s weren’t even aware of Merkel’s true identity.