The servants of Christ understand the Bible very well.
Except that Christians are all over the place when they tell us what the Bible says. Unbelievers tend to agree with one another more, which to me is an indicator of better comprehension. I had an experience discussing the book of Job in a mixed group on a competing message board. Several skeptics reported said that what they had seen was the story a capricious god cruelly toying with the life of a good man for a trivial reason - to demonstrate to a demon that no matter what was done to Job, Job would not curse that god. We thought that that was a pointless story of an immoral act by a god.
We were told by believers that we did not understand the story. They each proceeded to tell the thread what the story actually meant. Unfortunately, they couldn't agree.They offered three different interpretations.
One said that the point of the story is to be a person of integrity and faith no matter the circumstance in life, and no matter what well meaning but judgmental friends tell you.
Another said that Job was being tested the way a soldier would be to make him a better man - some kind of training.
A third said that Job was being punished because he was only behaving well to force God's blessings rather than for the sake of goodness itself, for which reason God allowed, and even convinced Satan to take away his blessings.
Notice that all three added an element to the story that wasn't there, and each added a different element.
The point is that the unbelievers all saw more or less the same thing, and each believer that weighed in disagreed and modified the story in a different way. That's the difference between reading the scripture impartially, and reading it through a faith based confirmation bias. In the former case, one simply reads the words and reports what they say however immoral, vague, or confused they appear. In the latter case, if the apparent meaning of the words needs to be sanitized, it is.
I'd say that that makes a the unbeliever a better judge of what scripture says.