IMO, as long as you state up front that your game/story/movie/play etc is fiction/fantasy, do what you want, get ideas and inspiration from whatever sources you want and have fun. If someone is offended, politely suggest they can go elsewhere. We aren't talking about a Doctoral Thesis. We are talking about a game for entertainment. If someone isn't having fun, perhaps they are in the wrong game. Just as baseball players might not enjoy playing football(either version), not everyone is going to enjoy playing a RPG set in setting X.
I have had players shocked and freaked out that I as a male player was playing a female character. Yet they had no problem as a human player playing a Orc barbarian character. Can't make everyone happy, don't stress out trying.
I have had players shocked and freaked out that I as a male player was playing a female character. Yet they had no problem as a human player playing a Orc barbarian character. Can't make everyone happy, don't stress out trying.