What would it take?

[vulcanlogician]

More than 90% of your fellow Christians disagree with that. You're just an exception. The problem is that it isn't so clear when one should read it plainly or dig deeper for meaning.

I'd put it at more like 30% by official denomination doctrine (Southern Baptists, Evangelicals, etc.) and a little less by personal conviction. I think many individual Christians are more likely take prophecies with a grain of salt, kind of like JairCrowford, relying on the "no one knows...not even the Son of Man", etc. It's sometimes a bit of a cop-out.

Assuming this is a credible chart of the denominational makeup of the United States, roughly 75% accept biblical inerrancy. Now, this doesn't speak to your thought about personal convictions. Although biblical inerrancy is the official doctrine of the Catholic Church, even among clergy there is dissent. Some mainline protestants (like Methodists) reject the doctrine, so we'll give you the mainlines (all of them). But the remainder, (including evangelicals-- which I assume must include fundamentalists as this chart does not differentiate between the two) probably preach biblical inerrancy. Being as charitable as I can, I reject your 30% estimate and say it's at least half-- if not two-thirds who accept and preach the doctrine.

You never did get to my other point which was: "it isn't so clear when one should read it plainly or dig deeper for meaning." This problem is hard to ignore when one considers a given text to be authoritative.