Again projecting doctrine onto text. There are no 3 persons called God in Scripture. One God alone is the the Shema.
The shema shows Jehovah is plural. Shma' Is-rael Jehovah (singular) your Elohim 9plural) is one (echad ordinal not cardinal) Echad is the term for a compound one!
John 1:1
King James Version
1 In the beginning was the Word, and the Word was with God, and the Word was God.
2 persons called God here! The first God has the definite article "the" in the texts, so it reads- "The Word was with the god and the Word was God. 2 people called God
3 But Peter said, Ananias, why hath Satan filled thine heart to lie to the Holy Ghost, and to keep back part of the price of the land?
4 Whiles it remained, was it not thine own? and after it was sold, was it not in thine own power? why hast thou conceived this thing in thine heart? thou hast not lied unto men, but unto God.
Lying to teh Holy spirit is lying to God!
Also :
2 Corinthians 3:17
Now the Lord is that Spirit: and where the Spirit of the Lord is, there is liberty.
In the Hebrew NT it is even clearer! "Now Jehovah is the Spirit". Not like John 4 where it says god is "A" spirit. This is specific.
The word trinity is made up, but the doctrine behind it is solid biblical truth.
two people are called Jehovah
two people are the first and last
two people are the alpha and omega
Elohim is plural
adonai is plural
when god is called one in the OT it is never with "yachid" the cardinal one (which means a single unit) but always with echad which is the ordinal one or compound one in many cases!
And if you wish to brag that teh Jews wrote the OT and reject trinitarianism, remember Israel has been temporarily set aside for rejecting the Scriptures so the gentiles can come in before God removes the blinders from their eyes.
Many supposed devout jews could not even recognize their Messiah though they klnew the SCriptures supposedly!