I had a whole post ready to go, and the confounded board timed-out on me, or
something!
Anyhow, I have NOT confused that site with your's, to be clear. My main concern is that they seem to assert that only the Pauline letters are FOR the Church today, in this dispensation of Grace. That anything from Hebrews, forward, is for Jews in the end times.
Clearly, however, the letters from Peter, James, John, and Jude are
to, and FOR believers, yes?