Monotheism is the original fundamental understanding of God Gen 1:1 that was forsaken and then reinstituted in Judaism by the following:

Hear, O Israel: the Lord our Lord is one Lord: Deu 6:4 How much plainer can it be made?     There are not three gods or persons, there is only one being who is Lord and His name is Jesus.      Jesus Is Lord When you read or hear the word, Lord, think Jesus.

When Jesus was born and recognized as deity we ended up with a Father and a Son.   Now there are 2 Gods (at least according to the Carnal Mind).   

With the promise of the Holy Spirit by Christ Jesus and His outpouring on the Day Of Pentecost we now have 3 Gods.   

Or so it seems.   ..   

How do we reconcile Deu 6:4 with this so called trinity?   

Was Moses wrong in Deu 6:4?   

If there are 3 Gods why not many more?   

The trinitarians claim 1 and 3 are the same which is illogical and deceptive as 1 is monotheistic while 3 is polytheistic.   

One of the problems creating confusion about our 1 God has to do with our connecting human father-son experience with the actual miracle of Immanuel - God with us.   

In human experience a father and a son are 2 different people.   

But 'God with us' should be taken literally and not fuguratively.   When taken literally, the eternal, omniscient, omnipresesent, omnipotent God (Who is Spirit ) manifested Himself on earth in flesh.   

With this literal understanding Jesus is the incarnation of God.   He is the Express Image of God.   This leaves us with the Father and Son being 1 and the same being as Jesus clearly taught us in Joh 10:30 Joh 14:9 .   

So, now we are left with only 2 of the trinitarian persons 1) Father/Son 2) Holy Spirit.   

When we read Mat 1:18,20 we find that the Holy Spirit begot Jesus in the womb of Mary.   So, by any straightforward thinking we conclude that the Holy Spirit is the Father of Jesus.   

Along with this revelation we obtain corroboration of it by Jesus Himself who said that God is a Spirit Joh 4:24.    Since there is only 1 Spirit 1Co 12:13, we must conclude that God is the Holy Spirit.   

Since the Father and Son are only 1 person, and the Father and Holy Spirit are the same person, then the Father Son And Holy Spirit is only 1 person.   

If you are still struggling with the simple concept of 1 God consider this verse:

In the beginning was the Soul, and the Soul was with the Holy Spirit, and the Soul was the Holy Spirit. Joh 1:1 What does it mean by in the beginning was the Word ?         ➛ A `word` is an expression of an idea.         ➛ An idea comes from a mind that is self-aware and able to think.         ➛ When a word is spoken it has a purpose and it often has an intensity or emotion connected with it.         ➛ Mind, will and emotions constitute a Soul.      So, the Soul Of God existed in the beginning.      What does it mean by the Word was with God ?         ➛ God is a Spirit    ➛ A spirit is the qualitative aspect of a being.     It represents the nature and value system of that being.         ➛ The spirit of a being is the essence of that being.         ➛ So, the Soul Of God was with the Spirit Of God in the beginning.      What does it mean by the Word was God ?         ➛ It means that the Soul Of God and the Spirit Of God constitute one divine being.      Joh 1:2 emphasizes the fact that the Soul Of God and the Spirit Of God existed in the beginning.      Joh 1:3 tells us that this God who is Soul and Spirit created all things.      Joh 1:10 tells us that Jesus made the world.      Joh 1:14 tells us that the Soul Of God, the Word, was made flesh and dwelt among us.     Now we have the Body Of God.     This is Jesus.      Heb 1:3 tells us that Jesus is the express image of God.      So, God is a single being who is Spirit Soul And Body just as man is who was created in His image Gen 1:26.         ➛ the Soul Of God,    ➛ the Spirit Of God and    ➛ the Body Of God constitute one God as is emphasized in Deu 6:4.      Word Creator In The Beginning

Here we find the Word and God being together in the strongest sense possible - they are the same being.   

Jesus is the Word made flesh Joh 1:14.    Jesus is the Incarnate Word.   Since the Word is God then Jesus is God.   

Now let's consider two facts:
   ➛ Jesus has all power in heaven and earth Mat 28:18
   ➛ Jesus is the only Saviour Act 4:12 Joh 14:6

If the Father is not Jesus then the Father has no power and the Father cannot save anyone.   

If the Holy Spirit is not Jesus then the Holy Spirit has no power and the Holy Spirit cannot save anyone.   

If you are still stuck on the trinity please tell me the names of
   ➛ the Father - as 'father' is just a role
   ➛ the Holy Spirit - as 'holy' is just a descriptor and 'spirit' is just a type of being

Seriously, if you have no name are you really a person?   

Jesus is the name of God.   He is the Spirit Soul And Body of the 1 and only True And Living God.   

Jesus is the name of the Father, Jesus is the name of the Son and Jesus is the name of the Holy Spirit, giving clarity to what Jesus was talking about when He used the singular word 'name' when referring to the Father, Son and Holy Spirit in Mat 28:19 .   

After all this, if you persist in trinitarianism, please give the other two persons names as a matter of respect for their personages.   

As for me, I will rework Moses statement in Deu 6:4 as Moses did not know the name of the Saviour and Lord Jesus Christ.