The true idea of ONE God does not comprimise the early Church doctrine of the Triune Godhead. I think some here need to review the following Scriptures.
Rom 3:30
30 Seeing it is one God, Which shall justify the circumcision by faith, and uncircumcision through faith.
(KJV)
1 Cor 8:6
6 But to us there is but one God, the Father, of Whom are all things, and we in Him; and one Lord Jesus Christ, by Whom are all things, and we by Him.
(KJV)
Eph 4:6
6 One God and Father of all, Who is above all, and through all, and in you all.
(KJV)
1 Tim 2:5
5 For there is one God, and one mediator between God and men, the man Christ Jesus;
(KJV)
James 2:19
19 Thou believest that there is one God; thou doest well: the devils also believe, and tremble.
(KJV)
Isa 7:14
14 Therefore the Lord Himself shall give you a sign; Behold, a virgin shall conceive, and bear a son, and shall call his name Immanuel.
(KJV)
Isa 9:6-7
6 For unto us a Child is born, unto us a Son is given: and the government shall be upon his shoulder: and His name shall be called Wonderful, Counsellor, The mighty God, The everlasting Father, The Prince of Peace.
7 Of the increase of His government and peace there shall be no end, upon the throne of David, and upon his kingdom, to order it, and to establish it with judgment and with justice from henceforth even for ever. The zeal of the LORD of hosts will perform this.
(KJV)
Matt 1:23
23 Behold, a virgin shall be with child, and shall bring forth a son, and they shall call his name Emmanuel, which being interpreted is, God with us.
(KJV)
John 14:8-9
8 Philip saith unto him, "Lord, shew us the Father, and it sufficeth us."
9 Jesus saith unto him, "Have I been so long time with you, and yet hast thou not known Me, Philip? he that hath seen Me hath seen the Father; and how sayest thou then, 'Shew us the Father?' "
(KJV)
To not recognize Jesus Christ as GOD come in the flesh is to try and say He was just an ordinary man like us, and basically propose that it's flesh that saves us. It is to refuse that Christ Jesus was fully God while in the flesh as fully man, and fully God before and after His time in the flesh. That's a doctrine of the Jews, and not one the early Christian Church had.
If Christ is not God then He could never have been named "Immanuel" per Isaiah 7 and Matthew 1:23. Likewise in Isaiah 9:6 He would never have been called, "The mighty God, The everlasting Father." Nor would Jesus have told Philip that if he had seen Him then he had seen The Father.
Heb 1:1-3
1 God, Who at sundry times and in divers manners spake in time past unto the fathers by the prophets,
2 Hath in these last days spoken unto us by His Son, Whom He hath appointed heir of all things, by Whom also He made the worlds;
3 Who being the brightness of His glory, and the express image of His person, and upholding all things by the word of His power, when He had by Himself purged our sins, sat down on the right hand of the Majesty on high;
(KJV)
Trying to treat our Lord Jesus Christ as man only is to attempt to remove "the brightness" of The Father's glory, and Christ as "the express image of His person". It's also Biblically wrong to assume that Christ is only like an angel that was created.
As Hebrews 1 reveals, Christ was part of The Godhead prior to the creation of the worlds. In Revelation 22 Jesus refers to Himself as Alpha and Omega, the beginning and the end in the everlasting sense, which is from the Book of Isaiah about God saying He is the first and the last, that there is no other God besides Him.
So just what is the difference if Christ is also God? It's simple. Per John 4 "God is a Spirit". That includes The Father, The Son, and The Holy Spirit. They cannot be separated as per that Spirit. Notice I did not say per flesh, but as per Spirit. When Christ was born through woman's womb into flesh like us, His Spirit was still as God, which is why... Scripture like Heb.1; Isaiah 7 and Isaiah 9:6. The distinction is about Jesus' suffering in the flesh upon the cross for the remission of sins for those who believe on The Father through... Jesus Christ, which is how Jesus Christ is our Mediator to The Father.