The similarity with Islam is in the beleive that all things necessary for salvation are contained in a certain sacred text. The said text is, of course different for the Protestants and for the Muslim, but the faulty principle is shared.
Lots of folks may differ with Christ's assertions about THE SCRIPTURES as well as Paul's and the rest of them.
But a high value on Scripture has served me exceedingly well in my life . . . and is certainly seeing me well toward eternal life with THE LIVING WORD.
Submitting my Holy Spirit led understanding of THE LIVING WORD to the magesterical
WOULD REALLY BE hysterically stupid, imho.
In other words,
NO FAULTY principle involved AT ALL.
Just a Biblical principle Biblically applied.
Other than belief in the Lord, nothing is necessary for our salvation
Actually, problems in my life surfaced for
lack of a lofty enough construction on Scripture and/or a flawed, sloppy, loose, partial adherence to Scripture's principles, truths and standards.
2nd most frequent disasters probably came from paying too much attention to the local substitute for the magesterical.
But, The Lord slapped my rear quite severaly a number of times for that and I got better at sifting, sorting and TRUSTING GOD ALONE . . .
to such degrees.
That the man of God may be perfect, throughly furnished unto all good works." -- 2 Timothy 3:16-17"All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness:
What did God leave out here that you find "necessary for salvation?"