Trinitarians say and believe that in this scripture of John 10:30, Jesus was referring to Himself, and His Father GOD as being ONE GOD.
I think we need to look at this some more, and there are three important facts to notice:
Jesus never said: I AND THE FATHER ARE ONE GOD.
But instead said: I AND THE FATHER ARE ONE.
These are not the same.
The Trinity doctrine teaches that there are THREE persons in the GODHEAD, and that the third person of the Godhead is the Holy Spirit. Yet the so-called third person of the Godhead of the Holy Spirit is not mentioned in John 10:30.
Why would Jesus leave out (and not even mention) such an important person of the Holy Spirit, if the person was indeed a separate person?
Now, the question becomes: if Jesus did not mean He and the Father are ONE GOD, then what did He mean?
WHAT DID JESUS MEAN WHEN HE SAID: I AND THE FATHER ARE ONE. John 10:30.
Most are confused with what Jesus said and meant here, and in their confusion they believe this proves that Jesus and the Father are, in fact, ONE GOD.
When I was a deceived Trinitarian for 10 years, I was one of those who misunderstood this to believe that Jesus meant He and GOD are ONE GOD, and I used the same TRINITY scriptures to support the Trinity, because I believed what I was taught by other deceived TRINITY teachers, instead of doing my own research, which is the same problem with most Trinitarians today.
However, then I changed my mind. I came to understand that this so-called statement contradicts Jesus’ own teachings – many, many times throughout the Bible – when Jesus said that He is the SON of God and there is only ONE true GOD, meaning (ALWAYS EXISTED), who has always been.
However, they are NEVER the same person; they are always two completely separate persons.
Jesus prayed to His Father, GOD, asking that He and His disciples could also become ONE:
Holy Father, keep them in your name, which you have given me, THAT THEY MAY BE ONE, EVEN AS WE ARE ONE. John 17:11.
I do not ask for these only, but also for those who will believe in me through their word, 21 THAT THEY MAY ALL BE ONE, JUST AS YOU, FATHER, ARE IN ME, AND I IN YOU, that they also may be in us. John 17:20.
Here it is clear Jesus prayed that GOD and His disciples would all become in complete agreement, and in harmony they would join together as a family, just as Jesus has ONE purpose with His Father, God – to be in complete agreement, harmony, and purpose, just as he desires to make all God’s children ONE in substance.