A shallow dupe wearing Protestant clothing can serve the devil very effectively

Discern the devil whatever clothing he is appearing in:

Romanism and Rationalism
As noted, textual criticism actually began in the sixteenth century. The Reformers and the later Puritans were very much aware of this discipline. Believing in the principle of sola Scriptura, they were strong advocates of the belief that God has preserved His Word in the majority of Greek and Hebrew manuscripts, which manuscripts were in basic agreement. The Roman Catholic Church, on the other hand, used a handful of copies in which numerous variants existed in an attempt to refute the principle of sola Scriptura. Without an infallible church to tell us what is and what is not the actual Word of God, said Rome, one can never be sure of the true text of Scripture. Romanism favored a few manuscripts with numerous differences, over the majority of manuscripts that were in basic agreement, whereas the Reformers and the Puritans, for the most part, took the opposite stand.41

Therefore, textual criticism over the last century has followed the principles used by Rome (and Enlightenment Rationalism), not those of the Reformers and Puritans. And that practice has led the church astray. We have been told that a few texts upon which the new translations are based are better than the majority of texts upon which the King James and the New King James Versions are based. As this article has shown, however, this is not true. The Westcott-Hort theory is not dependable. As Pickering wrote, it is unproved at every point.

You can say the champions of the Alexandrian Romanist manuscripts and the 'bible' versions based on them (people like James White) are shallow and simply duped, or you can say they are consciously carrying water for the devil, either way effectively they are carrying water for the devil. And on the most foundational and important matter for Christians.