Do Messianic Jews accept the entire New Testament?

Question

Do Messianic Jews accept the entire New Testament as a base of their belief? What is the position of Messianic Judaism (if there is a common position) on passages in the Gospel of John and the letters of Paul that can be understood as that Jesus was a form of God?

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Addition, as asked to say more about what are the passages that can be understood as that Jesus was a form of God.

John 1:1

In the beginning was the Word, and the Word was with God, and the Word was God.

John 1:14

And the Word became flesh and dwelt among us, full of grace and truth; we have beheld his glory, glory as of the only Son from the Father.

Stating «the Word was God» and «the Word became flesh» he sets the base for the thought that God, the Holy Spirit and Jesus are the same, which is not the Jewish (and Muslim) concept of God.

Numbers 23:19

God is not man, that he should lie, or a son of man, that he should repent. Has he said, and will he not do it? Or has he spoken, and will he not fulfil it?

Hosea 11:9

I will not execute my fierce anger, I will not again destroy E'phraim; for I am God and not man, the Holy One in your midst, and I will not come to destroy.

Answer 1

Do Messianic Jews accept the entire New Testament as a base of their belief? Yes.

The Holy Bible is the main religious text for Messianic Jews. They follow the teachings of the Torah (Old Testament) while also holding the New Covenant (New Testament) as God’s Truth. They believe Old Testament prophesies about the coming Messiah were fulfilled in the New Testament with the birth, death, and resurrection of Jesus Christ.

1. Bible - Messianic Jews believe the Bible is God’s Holy Word and follow the Old and New Testament. The Old Testament serves as a history of the Jewish nation, God’s covenant with Abraham, and the commandments given to Moses. The New Testament fulfills the Old Testament through the coming of Jesus Christ, the Promised Messiah and God’s Son.

2. Jesus Christ - Messianic Jews believe that Jesus Christ is the Promised Messiah prophesied in the Old Testament. He is referred to in Hebrew as Yeshua and regarded as the way of salvation for all who believe in his death and resurrection. They believe that Jesus’ death was payment for the sins of all. (Acts 2)

3. Trinity - Most Messianic Jews believe in the Trinity as God in three parts. God the Father, God the Son, and God the Holy Spirit are all displayed in the New Testament Scriptures through the Gospels (the first four books) and the book of Acts.

4. Sin - Messianic Jews acknowledge that sin is any behavior that is against the teachings of the Bible. Sin can only be forgiven through faith in the death and resurrection of Jesus Christ. (2 Corinthians 5)

Source: https://www.christianity.com/church/denominations/what-do-messianic-jews-believe-and-practice.html

Most, but not all, Messianic Jews accept the orthodox view of the Trinity. God the Father, God the Son, and God the Holy Spirit as three representations of the same divinity.

God the Father: Messianic Jews believe in God, and that he is all-powerful, omnipresent, eternally existent outside of creation, and infinitely significant and benevolent. Some Messianic Jews affirm both the Shema and the Trinity, understanding the phrase "the LORD is One" to be referring to "a differentiated but singular deity" and "eternally existent in plural oneness".

God the Son: Most Messianic Jews consider Jesus to be the Messiah and divine as God the Son, in line with mainstream Christianity, and will even pray directly to him. Many also consider Jesus to be their "chief teacher and rabbi" whose life should be copied.

God the Holy Spirit: According to some Messianic Jews, the Spirit is introduced in the Old Testament, is the inspirer of prophets, and is the spirit of Truth described in the New Testament.

Source: https://en.wikipedia.org/wiki/Messianic_Judaism#The_Trinity

You say: “Stating «the Word was God» and «the Word became flesh» he sets the base for the thought that God, the Holy Spirit and Jesus are the same, which is not the Jewish (and Muslim) concept of God.”

Please be aware that the the Father, the Son and the Holy Spirit are not “the same”. That is not the Trinitarian concept. Trinitarians acknowledge that there is only the One Being of God within whom subsist the three personages of Father, Son and Holy Spirit. Each is co-eternal and co-equal but they are DISTINCT, one from the other. Source: Athanasian Creed.