General Yeager said:
https://archive.md/o/pRUjq/https://www.cia.gov/readingroom/docs/CIA-RDP80R01731R003000180037-4.pdf
Kikipedia says that that speech is fake and Emanuel Rabinovitch never existed, it's a character invented by Eustace Mullins.
I searched for the Rabbi Emanuel Rabinovitch and haven't found anything about him or his life, only websites that quote this supposed speech.
So it appears to be fake.