I LOVE IT. I gobble up these details and adore immersion efforts in games. Being representative of the times is definitely going to be a big part of a 1930's game, so I say bring it on! Of course, Diana won't be terribly pleased with the lack of women's freedoms, liberties, and general social forward-thinking, but it'll be fun to play on that.
Diana will be adjusted. She'll also not be mentioning any kind of witchcraft anything or expressing knowledge about any occult subjects because this is, after all, a rather intolerant era. I imagine any characters learning about it save for the NPCs that would naturally have such information on mind would be a fun plot development.