This morning I was at a seminar on the history of Arab Jerusalem. Much of the focus was on the 6-9th centuries, though we then raced forward to look at the Mamelukes.
A number of the participants were themselves Arab. At one point late in the day I asked the Arab sitting next to me how common it is if for Arabs to know the minutiae sort of things he and his friends were demonstrating command of, since I don't think secular Israelis would necessarily know as much about their own traditions. Well, he said to me, people from our generation (40-50) mostly probably know this stuff. The youth, however, at least in my town (in the Galilee) probably don't know. They're Israelis, and don't care about this stuff anymore.
This is an anecdote, and may not prove anything. But it's an interesting anecdote.