My wife's an expert in the York Mystery Plays, and has a few pictures of them. Since most people have never actually seen Middle English handwritten manuscript, it does look a bit like something Tolkien might've doodled:
Spoken out loud, it's a beautiful and perfectly comprehensible language. Written in the original hand, you need to be an expert.
The point I was trying to make, is that y'all are reading this story as if the statistics were remotely plausible. They are not.
When I was at school we had a bunch of journalists come round and ask our class if we knew about the Battle of Hastings... slow news day, so let's invent one about how crap history education is. So, we all said, "What battle? Where's Hastings?" and sure enough the local paper was condemning the woeful lack of knowledge in history, much to the fury of our headmaster.
I didn't even do history at secondary school but even so, I still knew that the battle was actually not in Hastings, it was on Senlac Hill near a village called Battle, a few miles east of Hastings, and the Normans won it thanks to a strategic error by Harold, not by having an arrow in his eye. See, even if you DON'T study history over here, you still know the basics. The question from the journalist was dumb, therefore it deserved the dumbest answer possible.
I went to a normal normal grammar school from ages 13 to 18, and over the school year we had American evangelicals, Irish evangelicals, Baptist ministers, Methodist ministers, Catholic priests, Rabbis, Sikhs and Hindus come into the school as guest speakers, every Wednesday, for the religious assemblies (never saw an Imam though!).
My old form tutor left teaching to join a seminary and he's now a practising minister.
My kids go to a C of E school in the York Diocese and our village vicar is a former headmaster.
So, put the "how ignorant are you about the Bible" question in context. Such questions are so utterly derisory that people just answer the question as stupidly as possible - deliberately - thereby ensuring that whoever takes them at face value makes themselves look like asses. It's almost a national sport.
Over here, we have a saying: "If it's in The Sun (a newspaper) then it must be true". This is because Sun journalists ask dumb-ass questions a lot, and, quite rightly, get dumb-assed answers in response.
In the last census, people were asked what religion they were. On the basis that they thought it was none of the Labour Goverment's business, thousands of people said they were Jedis... enough for the government to have to consider declaring Jedi an official religion!