The claim its loyalty to be to the Textus Receptus, the Greek NT manuscript compilation completed in the 1500’s. To varying degrees, kjv only advocates argue that God guided Erasmus (the compiler of the Texus Receptus) to come up with a Greek text that is perfectly identical to what was originally written by the biblical authors. However, upon furture examination, it can be seen that kjv only advocates are not loyal to the Texus Receptus, but rather only to the kjv itself. The NT of the nkjv is based on the Textus Receptus, just like the kjv is.. Yet, kjv only advocates label the nkjv just as heretical as they do the NIV, NAS, etc.
Even when the KJ21 or NKJV attempts have been made to make minimal updates to the kjv, only “modernizing” the archaic language, while using the exact same Greek and Hebrew manuscripts.
These attempts are rejected nearly as strongly as the nkjv and other newer Bible translations.