Here, then, is a major, MAJOR problem with the translation.
That was MOST unfortunate. The Christian world has paid dearly for that verse's errors.
[ NOTE: The Aramaic-Syriac Peshitta agrees with the Greek text, both quite early. It seems the KJV translators followed the Latin Vulgate text for this one verse. Why, I do not know. --- sjh ]
Belief is NOT a mere mental agreement to an historical fact or a set of doctrines.