It sounds like you're familiar with the Bible.
I'm familiar with some portions of the Bible, but often I'm simply familiar with certain concepts, I search on google for the quote and reference it. If we were talking in person, I wouldn't be able to throw out verses as well as I do on the internet. I seek to become more familiar, but I see it as a lifelong quest. It is a beautiful Book of deep and complex meaning on the nature of God's creation and the purpose of our souls, as well as a history of the relationship between man and his creator.
Yesterday, I did some reading about Baha'i faith and came across statements like, "Throughout the ages, God has sent Divine Messengers known as Manifestations of God—among them Abraham, Krishna, Zoroaster, Moses, Buddha, Jesus Christ, Muhammad." Now it would be one thing if you consider those mentioned on the list Apostles (even though Christians do not typically believe they are) but a totally different thing if you consider them Divine and equal to Christ. Of course you know that Christ is the only begotten Son of God, the only Word of God. So, making others equal to Him is totally unacceptable. Also, He is the only redeemer of humankind, which is most important for Christians, and this was nicely expressed in the statement you quoted before.
Obviously, this is another place where my belief differs from accepted Christian Theology, and another reason why I am not called a Christian. However, it does not change my deep love and appreciation for Christ, nor my understanding that the only way to God and Eternal Life includes requires accepting Him and His claims.
I have Jewish members of my family, and we discuss Christianity occasionally. To them, Jesus was a man, perhaps a Rabbi, someone learned and a teacher of Judaism. They are of the belief that Christianity became "Pauline," which is to say, Jesus taught Judaism, and then Paul ran with it and taught something else. I, on the other hand, believe that Jesus was far more than a man, He was the Son of God, Divine, and that the Word He spoke was the Word of God. I believe in the divinity of the Torah, and also hold that Adam (The Father of Mankind), Abraham (The Friend of God) and Moses (He Who held converse with God) were Divine, more than mere men. As such, I am not called a Jew, because I hold the Jesus is the Messiah, the Son of God.
Similarly, popular Muslim Theology also holds that Jesus was a man. This theology teaches that the Torah and the Bible were literally corrupted, meaning that the words on the page were altered to control people and turn them away from God. They do not believe that Christ was crucified, but rather that He was replaced with someone who looked like Him; in doing so they contradict certain prophecies of the Torah, which Muslims defend by saying the text was corrupted. I do not agree with this Muslim Theology. Rather, I believe “that when the Son of Man yielded up His breath to God, the whole creation wept with a great weeping. By sacrificing Himself, however, a fresh capacity was infused into all created things." [Bahá'u'lláh]. As such, I am not called a Muslim, because I hold that Jesus was more than a man, he was a Manifestation of God, infinitely above the station of man.
You have noted what appears to be a contradiction in my belief: If Jesus is the only Word of God, the Only Begotten Son, how can I also believe that these others are divine? This is my answer, taken from the Baha'i Writings:
"Were any of the all-embracing Manifestations of God to declare: “I am God,” He, verily, speaketh the truth, and no doubt attacheth thereto. For it hath been repeatedly demonstrated that through their Revelation, their attributes and names, the Revelation of God, His names and His attributes, are made manifest in the world. Thus, He hath revealed: “Those shafts were God’s, not Thine.” And also He saith: “In truth, they who plighted fealty unto Thee, really plighted that fealty unto God.” And were any of them to voice the utterance, “I am the Messenger of God,” He, also, speaketh the truth, the indubitable truth. Even as He saith: “Muḥammad is not the father of any man among you, but He is the Messenger of God.” Viewed in this light, they are all but Messengers of that ideal King, that unchangeable Essence. And were they all to proclaim, “I am the Seal of the Prophets,” they, verily, utter but the truth, beyond the faintest shadow of doubt. For they are all but one person, one soul, one spirit, one being, one revelation. They are all the manifestation of the “Beginning” and the “End,” the “First” and the “Last,” the “Seen” and the “Hidden”—all of which pertain to Him Who is the Innermost Spirit of Spirits and Eternal Essence of Essences. And were they to say, “We are the Servants of God,” this also is a manifest and indisputable fact. For they have been made manifest in the uttermost state of servitude, a servitude the like of which no man can possibly attain. Thus in moments in which these Essences of Being were deep immersed beneath the oceans of ancient and everlasting holiness, or when they soared to the loftiest summits of Divine mysteries, they claimed their utterances to be the Voice of Divinity, the Call of God Himself." [Bahá'u'lláh]
This is the interpretation of both John 14:6 and Quran 33:40 that I hold. Please know that I am not asking you to accept this, merely explaining my own belief. So much fighting has occurred over differences in interpretation, such as the interpretation of Matthew 16:18, which the Catholics hold as proof of the authority of the Popes. I believe, like many Protestants, that this is response to Peter's affirmation of his faith in Christ: "Thou art the Christ, the Son of the living God." [Matthew 16:16] and not a reason to become Catholic. That is my personal belief. I have many Catholic friends and I do not fault them for a difference of interpretation, instead I celebrate what we do share: a deep love of Christ as savior, leading the way to Eternal Life. Perhaps they are right and I am wrong, but my heart and my mind lead me elsewhere. I believe that religion should be a cause of unity, love, and common cause, not the source of contention and strife. As such, I strive to respect different points of view on belief, and offer my own as a gift, not a burden, God willing. I am more than happy to talk about those differences of interpretation or belief as long as what I say does not cause offense.
Around 1844, 4 new religious movements were being formed: Mormonism, Adventism, Baha'i, and Ahmadiyya (more on this in a separate post). In the US, William Miller came up with the calculation you mentioned, declared that Christ would return in 1844, and gathered a large following. When Christ did not return in 1844, this event became known in history as the Great Disappointment. Meanwhile, Bahá'u'lláh announced that he was the returning Christ. But he had no proof. Obviously, the resurrection of the dead and end of the world did not take place at that time.
Great Disappointment - Wikipedia
To add to this, there were also four 19th Century claimants to the Mahdi promised in Islam at the End of the World:
Siyyid Ali Muhammad (The Báb) (1819-1850), declared to be Mahdi in 1844
Muhammad Ahmad (1844-1885), declared to be Mahdi in 1881
Mirza Ghulam Ahmad (1835-1908), declared to be Mahdi in 1882
Wallace Fard Muhammad (1877-1934?), founded the Nation of Islam in 1930, not sure when he made the claim of Mahdi
I am very familiar with the Great Disappointment, what an incredible period of history! My great great great great Grandfather was alive during that time and kept a journal. He didn't appear to hold to the belief that Jesus would return in 1844, but he commented on the meteor showers in 1843 and how it had excited and terrified many as a sign in the heavens of the approaching End of Days. People sold their properties and moved to Israel to await His coming. 4th Great Grandpa John was on a ferry in Lake Michigan and heard someone, whom he called "the Advent Man," telling everyone what William Miller taught was about to happen; the dead rising from the grave, the battle between Angels and Demons, Christ descending from the clouds, the stars falling from heaven, and so on, as is recorded in Matthew 24:29-31 and in Revelation. They didn't listen, and my grandfather commented that the Advent Man left the passengers of that ferry to their fate like Jonah, waiting for the destruction of Nineveh. The guy had a dry sense of humor.
My belief is that physical death, like the physical world, is secondary to spiritual death, which is unbelief in God. Jesus came from Heaven, but the Jews denied Him by saying He came from Nazareth, so clearly He couldn't be the Messiah. To me, John 3:13 clarifies things. Even while Jesus walked on the Earth, He was in Heaven. As such, His physical descent into the womb of Mary was not something that could be physically witnessed, nor could His existence in Heaven as He walked among mankind. Jesus came to show people the path to Eternal Life, which is Faith and belief in Him who is the Truth. As such, I hold to the interpretation that death and the dead rising from their graves refers to the spiritually dead recognizing God and being blessed with True Life. There are still dead in this world so the process is not complete, but I believe it is happening; today things do appear to be deteriorating, but I trust in God that this is part of His Divine Plan. Additionally, I hold that the End of the World too was a spiritual End of an old World, and that this occurred in 1844 with the declaration of the Báb to Mullah Husayn in Shiraz. I believe that this world is changing, and that the process is not instantaneous but, like with the crucifixion of Christ, what occurred in 1844 endowed the world with new spiritual potential.
Baha'i:
Founded by: Baha'allah (1817-1892)
Following leader: Abdul-Baha' (1844-1921)
Small addition and clarification:
The Babi Faith:
Founded by: The Báb (Arabic for 'The Gate') (1819-1850), declared His mission in 1844
The Baha'i Faith:
Founded by: Bahá'u'lláh (Arabic for 'The Glory of God') (1817-1892), declared His mission in 1863, Baha'u'llah is referenced by the Báb as "Him Whom God Shall Make Manifest."
Successor of Bahá'u'lláh: 'Abdu'l-Bahá (Servent of the Glory) (1844-1921)
The Babi Faith and Baha'i Faith are linked. There are Babis who disagree and did not accept Baha'u'llah, and they are called Azalis. Anyway, the only faith that began in 1844 was the Babi faith. However, that to me is not sufficient proof of the Báb and Baha'u'llah's claim by itself, but it is foundational to my belief and my interpretation of Matthew 24:15.
All that is to say, in answer to your earlier question, I do not call myself a Christian because I have beliefs and interpretations that differ from generally accepted Christian Theology.