A younger viewer used to countless cheap tacky Nazi stories could respond as if this episode is more of the same-- unless, of course, he/she has the basic sense to realize that this came out in 1967 or so, only 22 years after WW2 ended. They weren't dropping Nazis into TV series right and left. Some viewers would have been men who actually fought in the war. They didn't do this lightly.
It's a good point that the impact would've been different to viewers for whom WWII was a more immediate reality, but it's not as if stories about Nazis were rare in '60s TV.
Hogan's Heroes, which debuted in 1965, featured Nazis on a weekly basis for 6 years and 168 episodes, while
Combat! (1962-67) and various more short-lived drama or action series covered WWII more seriously.
The Twilight Zone did a number of episodes about Nazis: "Judgment Night," "Deaths-head Revisited," "He's Alive," and "No Time Like the Past" (not to mention other WWII-related episodes like "The Purple Testament," "The Howling Man," and The Quality of Mercy," and various fictional totalitarian states that were Nazi allegories).
Mission: Impossible did two Nazi-themed episodes per year in its first two seasons ("The Legacy," "The Legend," "The Bank," and "Echo of Yesterday"), plus one episode each dealing with Nazi war criminals in seasons 4 ("Submarine") and 5 ("The Merchant"); Martin Landau ended up impersonating both Martin Bormann and Adolf Hitler himself in the course of his tenure on the show. And of course Mel Brooks's
The Producers came out in theaters in 1968. WWII and the Nazis were a very common subject matter for TV at the time.
What if an historian like this was given all the blocks to play with that he wanted, a whole culture? I believe Marx was an intellectual who thought he could fix the world's problems, whose ideas were put into practice, with things going hideously wrong... Someone like Gill isn't as improbable as he seems.
Interesting comparison.
I have no problem with parallel earth stories. I've always been interested in how things could've developed differently here on earth and often wonder how different earth would be if such and such happened, such as if The Cuban Missile crisis led to all out war.
Sure, but it would make more sense in the context of alternate timelines or altered histories. Having some planet elsewhere in space just happen to duplicate our history may have been an acceptable way to make a 1960s SFTV show affordable, but it wasn't really a good idea per se.