Amazingly, the initial idea for Toht was more Skynet than Third Reich. Steven Spielberg originally envisioned Toht as a friggin' cyborg, complete with a glowing eye and a bionic arm that could transform into a machine gun or (if the situation called for it) a flamethrower. According to the director, Toht was to be "The Terminator before The Terminator" -- if the Terminator was an actual Nazi instead of just Austrian.
Proving that the early '80s were a backward, topsy-turvy time, it was George Lucas who put a stop to this silly concept. Spielberg's "heavy-metal view of the character" was halted once George "put his foot down," telling Spielberg: "you're crossing out of one genre and into another." To be fair, this was several decades before the same dude would insist on throwing aliens into the selfsame series.