Don´t feel discouraged or upset James, you are doing ok with your writing and ideas.
This is one subject in the writing world (Novels/ Books/ Films) that has always sparked a lot of talk,
alot of controversy and above all else ALOT of "what if" ideas from everyone.
Everyone who has ever studied WW2 history and war stuff will always have their own ideas on this matter too, so it
is all very normal , an no writer should feel discouraged.
I will always suggest to any writer, to read and learn.
Absorb and take into your mind these other thoughts and ideas, they will help you become a better writer and a better story teller.
Because even though it is a fictional story, it will always need that "special" and intriguing story to capture the book reader.
I dont believe your story to be any more or less intriguing and fascinating as that film "Iron Sky", which by the way, was
co-written by many people on the internet , who shared their wild-fantasies about Nazis living on the moon and
making flying saucers! That idea was so crazy and intriguing that it became a hit movie around the world. They are now
making a second film which will be even more crazy!
Your story is unique and it is all your own creation.
In all, it is all just good fun and you should never be discouraged. Just continue with your own version of the story and make it
fascinating.... because all people really want is an adventure.