Eloheim City provided great potential synergy between US and German intelligence:
Germany for years battled white supremacists in their country who often used contacts in the US for publishing racist literature, where such activity is legal. Meanwhile, the US worried about nuclear materials in former East Bloc countries finding their way into the hands of anti-government types and other (Middle East) baddies.
What would be more seductive to ambitious US goose-steppers than to get a souped-up, hot-headed, real GERMAN kook among their ranks?
Your pehpahs ah out ufff OHDAH...!
And so Germany put their man Streissmeir (whose father is a prominent German politician) on loan to the yanks. Andy would fly over the America, mix in with a bunch of US kooks, and get the goods on them.
Everybody would be happy!
Only, in most cases Streissmeir would act as agent-provocateur mostly, and then US authorities ended up acting too late on a brewing terror plot; they wanted to nab everyone red-handed juuuuust before the dirty deed, and instead ended up with egg on their faces.
Ach, sheitze...!
Andy had to be smuggled south across the US/Mexican border, and then out of the country, macht schnell.
The John Doe II Times is highly recommended reading....