“What is it that is so often misinterpreted?”
There are a few sort of continual struggles that the church has had to deal with over the centuries.
Baptism being of believers only or of children of believers is often misinterpreted. Both the Baptists and the Presbyterians can’t be right. One of us must be wrong.
End times is another. There are dispensationalists, amillenials, and postmillenials. We all believe Revelation and etc.; but we disagree as to the details.
Spiritual gifts is another: Bible believing Christians differ as to whether we are still supposed to be speaking in tongues, doing miraculous healings, and so forth.
Off the top of my head I’d say these are three of the main obviously misinterpreted things. I say they are misinterpreted because both sides obviously can’t be correct.
Some "Bible only" believers say once a person is saved, born again, salvation can never be lost.
Some "Bible only" believers say once a person is saved, born again, salvation can be lost.
Misinterpretation? I call it confusion.
Although, with God anything is possible. So maybe in these kinds of scenarios, both can be correct, even though to us it doesn’t appear possible.