It sounds like your friend is an Independent Fundamental KJV Only Baptist. I have been involved with these types of people briefly. They are usually very anti-Catholic (and interestingly enough, very anti-Calvinist as well). Some of them hold to the 'Baptist successionism" teaching which claims that there have always been churches who believe the same thing modern Baptists believe, and that these churches were independent of the established Church, which they (correctly) identify as the Catholic Church. They claim that groups such as the Montanists, Paulicians, Waldenses, Albigenses etc were actually Baptists. Never mind that these groups did not teach anything like modern Baptist beliefs. Those who hold this view generally do not see themselves as Protestants.
With regards to the KJV only position, there are a variety of viewpoints and they are explained
here. Generally they will say that the manuscripts behind the modern critical text from which all the new Bible versions (except the NKJV) are translated from are corrupt. There is some evidence for this, and I have myself held that position. But many of these Independent Fundamental Baptists will claim that the KJV has some level of inspiration, and some go so far as to say that the KJV can be used to correct the original Hebrew and Greek. Some even say that if a non-English speaker wants the Bible, they need to learn English and read the KJV.
If you want to read more about the KJV only position to try and help your friend, James White’s book
The King James Only Controversy is very extensive. (Keep in mind, though that White is
very anti-Catholic).
