Definitely on the curriculum then, when your DH was at school, and still is! It has never 'not' been taught as part of the history curriculum in both KS2 and in high school (I'm your DHs age AND a teacher 🤷♀️)...and even if he (was under a stone!) somehow missed it, to have reached his age and not even have heard of Anne Frank is, quite honestly, unbelievable and, honestly, just ignorant. I could not be in a relationship with someone so uneducated and ignorant...I just couldn't!! I'd be embarrassed.
I'm often shocked and dismayed by how very uninformed, about really quite basic history, grown arsed adults appear to be sometimes! Anyone with half an ounce of curiosity about their own country would surely have tried to educate themselves about something so fundamentally important as WWII at some point in their lives!
Posters saying that 'lots' of people in the world won't have heard of her...well of course! But these people would be either way too young (under 7...WWII is taught from Year 3 on, in most British curriculum schools) or from countries with ZERO connection to WWII. For anyone else there is simply NO excuse!!! Really...none!
To put this in perspective...I've just texted my 8 year old DGS to ask if he knew who Anne Frank was...his reply was 'yeah the Jewish girl who hid from Hitler, then got caught...she died didn't she? And all her family died!' I separately asked my 30 year old DD (so we have a 3-generational experience here!) and she sent me this:
"I know I'm blonde mum, but I'm not stupid! Can't you remember my homework in year 7 when I had to pretend to be hiding from the Nazis and write a diary for a week in 'the style of' her? I wanted to sleep in Nana's attic 😂"
I can only assume your DH is either not very bright (didn't retain much of his earlier education) or simply isn't intellectually curious. Neither of which are particularly attractive to be honest 🤷♀️