Thats interesting. In Pope Leo XIII’s vision, on Oct. 13 1884 after Mass, he heard satan and christ speak, the former demanding the latter allowing.
In christianity this satan at some point in the future becomes a man, as christ God became man. And as many jews followed christ when he came, but not many of their religious leaders, christ said; I am come in the name of my Father, and you receive me not: if another shall come in his own name, him you will receive.
This I think might be the source of the belief that satan will, when he comes in his turn as a man, be accepted by the jewish people. This seems to be complicated by your belief that satan is actually Gods agent.