The Ahavat Elohim messianic forum statement of faith says:
"We believe in one God, who manifests Himself in three forms: The Father, The Messiah (The Son), and The Holy Spirit. Because Yeshua The Messiah is HaDavar, the very word of God (see Yochanan/John chapter1), we consider him to be a part of the God of Yisra'el. Thus, we consider The Messiah to be a manifestation of God in the flesh.
"The Shema ("Hear O Yisra'el, YHVH our God, YHVH is one" Deut. 6:4) teaches that God is one (Echad / a compound unity). God is the creator and ruler of all things. He alone has made, does make, and will make all things. He alone is our God. He was, He is and He will be. He is the first and the last, the Aleph (Alpha) and the Tav (Omega), and besides Him there is no other.
"We believe that Yeshua HaMashiach (Jesus The Messiah) is The Annointed One all of the scriptures point to, and also the primary builder of The Kingdom Of Heaven. We believe in His virgin birth...."
So the "trinity" is not anathema to all modern Jews, though it is to modern non-messianic Jews, and though messianics don't agree with the name/idea "trinity" (not sure exactly what te difference is).
Evidences for "tri-unity" of God in bible. (Some of the people in this thread have already mentioned a few of them.)
- Elohim in Genesis 1 is plural.
- God said "we/us/our" in Genesis 1. (Allah also says we/us/our in Koran.) How else can we explain the origin of the use of pluralis majesticus by kings etc?
- "God is love". You can not have love with only one all alone. Ehad "one" value 13 = Ahava "love" value 13, 13 = 1 & 3?
- In the verse "hear oh Israel the lord your God is One" the word for "one" is Echad/Yahad which is plural singular like unity/union not only singular one all alone.
- Jesus on cross said "Eloi Eloi why have you forsaken me". That is two Elois which plus Jesus equals three?
- "Holy holy holy" in Isaiah and Revelation. Was & is & is to come? God of Abraham, Isaac & Jacob?
- A source says the holy of holies of the temple is alternatively read "place of the 3 holy ones"?
- Islam says Allah has "two right hands", which means two not one?
- The number 666.
- The "false trinity" of Dragon, beast/antichrist, false prophet.
- Cabala has upper and lower trinities. (Kether, Binah, Hokhmah.)
- Hebrew language has 3 letter/consonant roots.
- YHWH/JHVH has three letters.
- Man is in image of God. Man is 3 parts body, soul, spirit.
- Triads in nature. 3 lobes of brain. 3 dimensions. 3 states of matter. "space, matter, energy"? 3 letters in blood groups (ABO)? 3 types of finger prints?
- Trinities in other nations mythologies. 3 Hermes / Hermes Trismegistus. Brahma, Vishnu, Shiva.
- 3 parts of Tanak (Torah/Law, Writings, Prophets)? 3 main names of God? 3 Abrahamic religions? 3 languages of bible & of INRI (Hebrew, Aramaic or Latin, and Greek)?
- 3 crucifixion nails in Caiaphas ossuary? (And 3 crosses? And 3 days?) Or 3 arms of cross (head and arms/hands)?
- "The Lord said to my Lord" (Psalms) equals two.
- "The Lord bless you and keep you" verse has the Lord three times.
- "Father, Son, Holy Spirit" Matthew 28:19.
- "the Father, the Word and the Spirit, and these 3 are 1" (1 John 5:7-8).
- The abbreviation INRI of the words in the cross superscription is YHWH/JHVH in Hebrew.
- Jesus was called Lord (Kyrios/Adonai).
- Pliny the Younger records that Christians sang a hymn to Christ as a god.
- Jesus made clay when he healed the blind man, like the Creator in Genesis 1-2.
Jesus walked on water like the spirit of God in Genesis 1?
- Meanings of names of 10 patriarchs in Genesis "..., the Blessed God, shall come down, teaching, his death shall bring, despairing, comfort."
- "God was manifest in the flesh...." 1 Timothy 3:16.
- Jesus calmed the storm in the sea of Galilee and the apostles said "who is this that commands even the wind and the sea" implying a connection with God.
- "Christ Jesus: who, being in very nature God" (Philippians 2:5-5).
- "For in Christ all the fullness of the Deity lives in bodily form" (Colossians 2:9).
- "The son is the radiance of God's glory and the exact representation of his being...." (Hebrews 1:3.)
- Jesus is called the "Only begotten" "Son of (the most high) God". How can God have a son that is not also God too? "Son of God = incarnation of God".
- Jesus said to the disciples/apostles "I and the Father are One", "He who has seen me has seen the Father".
- Jesus is confirmed as one with God in this verse "For unto us a child is born. To us a son is given; and the government will be on his shoulders. His name will be called Wonderful, Counselor, Mighty God, Everlasting Father, Prince of Peace." (Isaiah 9:7).
- "In the beginning God created the heavens and the earth" (Genesis 1:1). "through whom he (Jesus) also made the universe" (Hebrews 1:2). "Jesus Christ, by who are all things, and we exist through him" (1 Cor 8:5-7).
- The spirit of God and the spirit of Christ seem to be the same in Romans 8:9?
- The name Jesus/Yeshua has Yah in it. "Yehoshua/Jesus is Yhwh/Jhvh with an -sh- put in it"?
- Emmanuel means "El/God with us".
- Why did Jews try to stone Jesus for blasphemy?
- People are told not to worship men or angels, but Jesus didn't stop people who worshiped him.
- Thomas said "My Lord and my God".
- Jesus said "I Am".
- Jonah said salvation is from Yhwh (Yeshua in reverse).
- "In the beginning was the Word, and the Word was with God, and the Word was God" (John 1:1).
- "who is this who forgives sins? only God can forgive sins".
- Jesus is called the Alpha and the Omega. In Genesis 1 God is the Aleph and the Tau.
- God is God and can divide himself into any number of parts he likes.