The biggest reason that Christians have difficulty accepting that one of the three men who visited Abraham is not Yeshua is because their minds are so attached to the trinity teaching which holds that God is only composed of three persons.
They try to box all physical manifestations of God into this limited definition.
Another problem with the trinity is that it has a tendency to give us this idea of God being composed of three different pieces that form a whole.
We mistakenly apply this three-dimensional thinking to our understanding of God.
The image that tends to get formed in our minds is that God is a general and the Holy Spirit and Yeshua are his close subordinates.
While this analogy would be correct when applied to God and his angels, it is not correct when applied to God, the Holy Spirit, and Yeshua.
The Holy Spirit is 100% God!
Yeshua is 100% God!
They are not subservient beings.
It’s not like when Yeshua was here on earth, the Father in heaven was only two-thirds whole.
God in heaven was NOT incomplete while Yeshua conducted his mission on earth.
I think it is much more theologically accurate to think of the Holy Spirit and Yeshua as “manifestations” or “attributes” of God.
But I cannot be dogmatic about that either.
The simple truth of the matter is that it is notoriously difficult to express the mysteries of God in words.
As paradoxical and mind-bending as it may seem, the Scriptures clearly teach that Yeshua was 100% God and 100% man.
Yeshua Himself said, “My father and I are one and the same!”
He said, “He who has seen me has seen the Father.”
Now based on a three-dimensional logical construct, how does that make sense?
Well, it doesn’t.
So you have to think about it in a different way.
One way to look at is this way: If you have seen the perfect implementation of a plan by Yeshua given to Him by His Father, then you have also been witness to the mastermind behind that plan.
So in that sense, if you have seen Yeshua, you have seen the father.
Another way to look at it is like this: In your own daily life, you play different roles, don’t you?
For example, if you are a man married with children, simultaneously you are a loving husband, a father to your children, and when you are working you play the role of faithful employee to your employer.
So in a sense, each of these different roles is a manifestation of who you are but you yourself are still the same.
You are not less of you when you are a playing a different role.
So along the same line of reasoning, the roles of the Father, Son, and Holy Spirit are as follows:
Father= The grand author of the salvation plan for mankind
Holy Spirit=The enabler and messenger of the divine plan
Son=The implementer of the divine plan
Finally, here is an interesting historical fact for you to contemplate.
During the period of 300 years following Yeshua’s crucifixion, the early church did not have a trinity doctrine.
It was not until the church was Romanized and taken over by Gentiles in the 4th century did this teaching come into being.
The first written record of this concept was formulated in what we know today to be the Athanasian Creed:
“…we worship one God in Trinity and Trinity in Unity… for there is one Person of the Father, another of the Son, another of the Holy Ghost is all one… they are not three gods, but one God… the whole three persons are co-eternal and co-equal… he therefore that will be saved must thus think of the Trinity…”
This is just another example of those teachings that have caused a serious rift between Jews and Christians.