They’re not undisputed.
Maybe by the Catholic church they’re undisputed, but others don’t agree.
If someone denies the divinity of Christ, they aren’t believing in the Jesus presented in Scripture, the one who died for them. Not any old person called Jesus is capable of saving.
I’ve never been able to figure out whether belief in the HS is essential for salvation. Since it’s Jesus who died and saves, and that’s the critical part, I’ve never given it much thought. I’ve met only one person in my life who doesn’t believe that the HS is part of the Trinity.
Maybe by the Catholic church they’re undisputed, but others don’t agree.
The Epistles mentioned specifically be Eusebius and Saint Jerome (and the Epistle to the Smyrnæans is in this group) were never questioned by ANYONE until they became inconvenient for John Calvin.
If someone denies the divinity of Christ, they aren’t believing in the Jesus presented in Scripture, the one who died for them.
The same can be said for those who deny His Real Presence.
I’ve never been able to figure out whether belief in the HS is essential for salvation.
By "HS" I assume you mean the Holy Spirit? Do you attend one of these congregations where our Lord is called "JC" and the preacher "raps" with the congregation before everyone sings Kumbaya?
Since it’s Jesus who died and saves, and that’s the critical part, I’ve never given it much thought.
Which is why YOPIOS is a tool of Satan.
[31] Therefore I say to you: Every sin and blasphemy shall be forgiven men, but the blasphemy of the Spirit shall not be forgiven. [32] And whosoever shall speak a word against the Son of man, it shall be forgiven him: but he that shall speak against the Holy Ghost, it shall not be forgiven him, neither in this world, nor in the world to come. (Matthew 12:31-32)