People who did not understand what 'Emmanuel' meant also did not understand that man is spirit, soul and body and also did not understand what God meant when He made man in His image.
So they came up with 3 people acting as 1.
Such an obviously stupid concept in light of God telling Moses that the Lord their God is 1 Lord.
Christianity had no business becoming polytheistic.
But men who rationalize the scriptures without being filled with the Holy Spirit are capable of any kind on nonsense.
And such men who are respected above the Word and Holy Spirit propogate error.
Consider the stupidity of observing the resurrection of Jesus on different days every year. Jesus died on a specific day and He arose on a specific day.
Consider the stupidity of elevating Water Baptism above Holy Spirit Baptism.
Tradition is not the same as Truth.
If you are not in an intimate, personal relationship with Christ Jesus by virtue of being born again, baptized with His Holy Spirit and eating and drinking His Word, you need to drop your religion and become One with Christ Jesus in Spiritual Marriage.