I'd like to receive some expert advice on this issue please.
My grandfather was born to a Jewish family in Cairo in 1929. He did not have an Egyptian citizenship but I recently discovered he (as well as sibling and parents) had an Italian passport when he left Egypt for Israel.
We know for sure they had Italian passports and we also know that he and his family left Egypt to spend a few months in Naples, because his mother had to undergo a surgery and then recover there in Naples. I assume she couldn't receive medical treatment without having a citizenship. From Naples they came to Israel in Oct 1949.
We don't have his or the others' passports s.
I'd like to locate his vital records, the ones that will indicate his citizenship. Since I don't have the passport, I don't know which city issued it.
I reached out to:
- Italian Embassy in Israel, and they did not find his details in their documents.
- The Italian Embassy in Egypt responded that they do not have access to their archives because of security problems (I think there was some sort of attack on the embassy a few years ago?). That was probably my best chance

- I reached out to several cities' archives but did not get a response, and I can't imagine I'll be able to to reach ALL cities in ALL of Italy..
In this situation, what would you suggest?
1. Since he was born in Cairo, he probably applied for his Italian citizenship in Cairo and his passport was issued in Cairo as well. What was the process like in terms of association to a specific city in this case? When you're issues a citizenship by the Embassy? Is an issuing city randomly chosen?
2. What sort of central indexes (regional/provincial) indexes would you recommend I reach out to, so that I don't have to reach EVERY city for a possible record?
3. Considering the Italian embassy in Cairo isn't functioning and their records aren't available physically, does the Italian government has some sort of copy of these records that can be possibly accessed?
I'll appreciate any tips and suggestions!