This so interesting-enthralling, a bit hard to believe . Would love to hear this story from some Satmara (or their side of this story!)
Needless to say that this is just אויסגעזויגן פון פינגער.
If you can get your hands on the book בוצינא קדישא מר׳ סענדר דייטש, the right hand man from Satmar Rov who was a gifted writer, he tells the story at length with all details as he was personally involved with it and the legal efforts in the aftermath. Satmar Rov didn't want to know who keeps Yosele and where he is being kept, as he didn't want to have involvement in his abduction case. Only on that Saturday night after the FBI picked him up from the Gertner family he was told the details and started to engage legal efforts to avoid having him handed over to Israel.
Satmar Rebbe was also interviewed by the NY Times days later and told them that although he had no involvement in the case it is clear that according to the Torah he was not allowed to be returned to his freiya parents who abandoned him for years anyway. He also vehemently pointed out in that interview the idiocy of the Israeli government who abducted numerous Yemenite, Moroccan and other children from their frum parents and yet all of the sudden turned the world over in this case.