Arg I am saying, weirdos, that ASSUMING IT WAS BASED ON A REAL THINGY THAT REALLY HAPPENED (does that answer your "is sci-fi a bad thing" question?) and it has ALL of the facts untouched (for example you can't re-write ww2's history and make a pro-nazi game in which you claim the nazis were just defending themselves and were actually the victims or something crazy like that) then that's fine
EVEN if the maker was from the "bad side", meaning, even if the maker IS IN FACT A NAZI or supports whatever "bad" event, then he CAN make a pro-nazi game, which will show the war from their side, while NOT throwing out ANY crime they committed, that sort of a game is fine, you can play as a nazi soldier, you can murder people for no reason and think it's awesomezorz and stuff, and you can let the player be the judge of "was it right or wrong to kill so many people just for being slightly different"
it allows the "good side" to step out of the "that's the bad side no matter what" box, see what happened from their point of view and judge for themselves if that's good or bad.
Realizing in the end 1 of the following:
A. omg I never realized just how crazy those nazis were
B. omg I never realized that even the nazis had feelings... for themselves obviously... but yeah...
C. omg I can't believe it's not banned.
of course if you were a nazi and played it, you would see nothing wrong with the picture.
but ask yourselves this:
how many times have you killed nazi soldiers, bashed their skulls, so on and so forth, without giving them a chance to surrender in games you see as "good vs bad".
It's perfectly ok for the "other" side to make games too, you probably won't like them, they might look insane, you might wish to kill the developers, but if they follow the basic rule of telling the truth, IT'S FINE.
now, need I explain it AGAIN?