Making a god of their own image!

What have they done to my God? They have sliced him into three parts like a piece of pie!!!!  Don't they read Deuteronomy 6:4?  Rome has added to the word of Jehovah and Jehoshua. They have made my God a mystery instead of what the Bible says!

"The mystery of the Trinity is the central doctrine of the Catholic Faith. Upon it are based all the other teachings of the church..." Handbook for Today's Catholic, p. 11.

John 17:3 (ASV)
And this is life eternal, that they should know thee the ONLY true God, and him whom thou didst send, even Jesus Christ.

The Shema which is what Jesus taught about His Father:

Deuteronomy 6:4 (ASV)
Hear, O Israel: Jehovah our God is ONE Jehovah:

Mark 12:29-34 —And Jesus answered him, The first of all the commandments is, Hear, O Israel; The Lord our God is ONE Lord: And thou shalt love the Lord thy God with all thy heart, and with all thy soul, and with all thy mind, and with all thy strength: this is the first commandment. And the second is like, namely this, thou shalt love thy neighbor as thyself. There is none other commandment greater than these. And the scribe said unto him, Well, Master, thou hast said the truth: for there is ONE God; and there is none other but he: And to love him with all the heart, and with all the understanding, and with all the soul, and with all the strength, and to love his neighbor as himself, is more than all whole burnt offerings and sacrifices. And when Jesus saw that he answered discreetly, he said unto him, Thou art not far from the kingdom of God. And no man after that durst ask him any question.

4. Galatians 3:20 — Now a mediator is not a mediator of one, but God is ONE.

25. Ephesians 4:6 — ONE God and Father of all, who is above all, and through all, and in you all.

1 Timothy 1:17 — Now unto the King eternal, immortal, invisible, the ONLY wise God, be honour and glory for ever and ever. Amen.

1 Timothy 2:5 — For there is ONE God, and ONE mediator between God and men, the man Christ Jesus.

James 2:19 — Thou believest that there is ONE God; thou doest well: the devils also believe, and tremble.

Romans 3:30 — Seeing it is ONE God, which shall justify the circumcision by faith, and uncircumcision through faith.

1 Corinthians 8:4-6 — As concerning therefore the eating of those things that are offered in sacrifice unto idols, we know that an idol is nothing in the world, and that there is none other God but ONE. For though there be that are called gods, whether in heaven or in earth, (as there be gods many, and lords many,) But to us there is but ONE God, the Father, of whom all things, and we in him; and one Lord Jesus Christ, by whom are all things, and we by him.