The Father is the one true God, so is the Lord Jesus, and so is the Holy Spirit. That the Father is God does not exclude the Son. There are 3 egos in the one God.
The proof is absolute in scripture for Christ being God.
First, he has the attributes of God.
Second, He is called God.
3rd, He has the name of God.
Before Abraham was born, I AM.
The audience recognized the claim in John. I AM is a name of God.
Except you believe that I AM, you shall die in your sins.
There is no SAvior, but YHWH; Isaiah is clear. Scripture is also clear that the Lord Jesus is the Savior par excellence.
There is none other name under Heaven, given among men whereby we must be saved.
1Tim. 1:1 God our Saviour,
2:3 This is good and acceptable in the sight of God our Saviour;
4:10 For to this end we labor and strive, because we have our hope set on the living God, who is the Saviour of all men, specially of them that believe.
1:4 Christ Jesus our Saviour.
2Pet. 1:1 Simon Peter, a servant and apostle of Jesus Christ, to them that have obtained a like precious faith with us in the righteousness of our God and Saviour Jesus Christ:
Titus 2:13 looking for the blessed hope and appearing of the glory of our great God and Saviour Jesus Christ;
As Thomas confessed (no rebuke) to Christ: My Lord and My God!
His name is Immanuel = God with us.
He is El Gibbor, the Mighty God.
At His incarnation He was named Jesus, YHWH-salvation, because He (Jesus) would save! If He were not actually YHWH that would be a blasphemy. But God doesn't blaspheme Himself. To merely get a theanthropic name can be for no higher reason than to commemorate God in some way. But Jesus was given the name of YHWH-salvation BECAUSE He Jesus was going to save. Thus the name itself with the reason given is that He is YHWH the only Savior.
After Christ became a man, adding humanity to His deity, it was given Him in that theanthropic union to have
THE NAME WHICH IS ABOVE ALL NAMES (Philip 2) which is YHWH.
Romans 10:13 makes this clear. For in context "LORD" = the Lord Jesus. But the quote is from Joel where LORD is YHWH. For whosoever shall call upon the name of the kyrios shall be saved. Kyrios (in its genitive form) stands for YHWH. From Hebrew it is rendered, "For whosoever shall call upon the name of YHWH shall be saved."
He is not just called God, but YHWH.
With this you may compare where the NT says that Isaiah saw Christ's glory, but in Isaiah 6 it is YHWH's glory that was seen by Isaiah.
Isaiah 48 puts it all together in words like those of John 1 where in the beginning was the Word, and the Word was with God, and the Word was God.
Come ye near unto
[2] me, hear ye this; from the beginning
[2] I have not spoken in secret; from the time that it was, there [2] I AM : and now
[1] the Lord YHWH hath sent me, and
[3] His Spirit.
I AM is a name of YHWH.
Except ye believe that I AM,
Ye shall die in your sins.
Will you now fall back & to your knees on the ground?
John 18: Whom seek ye? They answered him, Jesus of Nazareth.
Jesus saith unto them,I AM!
And Judas also, who betrayed him, was standing with them.
When therefore He said to them, I AM!,
they went backward, and fell to the ground.
And having fallen down, will you set down your stones?
Jesus said unto them, Verily, verily, I say unto you, Before Abraham was born, I am. They took up stones therefore to cast at him:
Will you confess with Thomas? My Lord and My God!