The verse quoted is John 10:30: “I and the Father are one.” (NIV). But if we read the context, in John 10:25–30

Jesus answered, “25 – I did tell you, but you do not believe. The works I do in my Father’s name testify about me, 26 – but you do not believe because you are not my sheep. 27 – My sheep listen to my voice; I know them, and they follow me. 28 – I give them eternal life, and they shall never perish; no one will snatch them out of my hand. 29 – My Father, who has given them to me, is greater than all[c]; no one can snatch them out of my Father’s hand. 30 – I and the Father are one.” (John 10:25–30, NIV)

Here, Jesus clearly distinguishes himself from God, saying the Father “is greater than all.” The “oneness” he speaks of is unity in purpose, not identity.

This is confirmed in John 17:20-23, where Jesus prays for his disciples:
20 – “My prayer is not for them alone. I pray also for those who will believe in me through their message, 21 – that all of them may be one, Father, just as you are in me and I am in you. May they also be in us so that the world may believe that you have sent me. 22 – I have given them the glory that you gave me, that they may be one as we are one— 23 – I in them and you in me—so that they may be brought to complete unity. Then the world will know that you sent me and have loved them even as you have loved me.(John 17:20-23, NIV)

If “one” meant divinity, then all disciples would also be divine, which Christians themselves do not believe.

Both the Bible and the Qur’an affirm pure monotheism. Jesus himself said:
“The Lord our God, the Lord is one.” (Mark 12:29, NIV)

And the Qur’an teaches:
“Say, He is Allah, [who is] One.” (Qur’an 112:1, Sahih International)

So we agree on the most important truth: God is One, without partner or equal, worthy of worship alone.