The Arthashastra recommends never acting on intelligence which hasn't been confirmed through at least three independent channels. Russian, swiss, and US secondary sources agree on the the underlying events of that scenario. I guess if the soviets really had had a highly-placed mole like Stierlitz, they could have done more, perhaps have been subtly encouraging top nazis first to prioritise ideology over pragmatism and then to get into speed, into the occult, and into the bunker.
Nighttime, 1944 Berlin: A ushanka-wearing man with skis and a parachute creeps silently along the hallway of an apartment building. He raps quickly on one of the doors.
A dishelved german in nightcap and house shoes opens after a few minutes.
"The eagles fly over the campfire. Repeat: the eagles fly over the campfire!" whispers the man in the hallway.
"Sorry," says the german, "I'm Otto Stierlitz the plumber, born 1904. You want Otto von Stierlitz the spy, born 1899. He lives up on the third floor."
seek variety of manipulated information: https://news.ycombinator.com/item?id=24600424
systematically analyse received information: https://news.ycombinator.com/item?id=23897577
analyse especially source levels: https://news.ycombinator.com/item?id=24459177
compare https://news.ycombinator.com/item?id=24403135 and remember we may have evolved big energy-guzzling brains in order to see through primate politics.