This study goes over the scriptures and doctrinal reasons that contradict the doctrine of the trinity, along with the manuscript evidence proving the forgery of the two trinitarian verses. The study can be found in English here
The Deception of the Teaching of the Trinity | Wisdom of God or in Spanish here
El Engaño de la Enseñanza de la Trinidad | Sabiduria de Dios . Let us begin a discussion on this matter here.
Usually, when someone rejects the idea of the trinity it is either because they do not believe in the deity of Christ and the person of the Holy Spirit or because they cannot conceive of the "One God" of Deut 4 as representing anything but a single numeric essence of being.
I've had a read though but its just a lot of out of context quotes, strung between unwarranted assumptions and unsubstantiated assertions. It's not worth spending time on but for those who might read this I will make a comment on the falseness of your opening assertions.
1John 5:7-8. It's true that the phrase "
the Father, the Word, and the Holy Ghost: and these three are one." does not appear in later manuscripts, as many translations note. But that does not mean that it is a
forgery.
A forgery implies a deliberate attempt to deceive. which you have not, and cannot, prove. Some commentators suggest it was a gloss (a comment) that became added to some texts when copied. This would be a corruption; to call it a forgery is dishonest
Matthew 28:19 You provide no evidence that this was not in the original texts, nor do I know of any. I know of no translation that comment on this. Even the JW translation (and they are not Trinitarian) has this verse.
You claim that it is a forgery seem to be based on your intellectual inadequacy to reconcile it with text that refer to baptism "in the name of Jesus". Actually it is quite simple.
At the time there were two baptism's with water in operation - John's baptism and Christian baptism (see Acts 19:3-5). Baptism in the name of Jesus (and variations) was the name or designation given to Christian baptism to distinguish it from John's baptism.
When Jesus said (Mt 28:19) "Go therefore and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit" he was giving them the form of words to be used in the baptism.
The
Didache or
The Teachings of The Twelve Apostles is an important work, believed to date to the 1st century. Indeed some date it as early as 60-70 AD. The author is unknown and one source suggests it is a composition of two or three tracts. It seems to be a manual of instruction for pagans who wish to become Christians and contains catechetical and liturgical instructions. It says this on how to baptise:
“And concerning baptism, baptize this way: Having first said all these things, baptize into the name of the Father, and of the Son, and of the Holy Spirit, in living [running] water. But if you have no living [running] water, baptize into other water; and if you cannot do so in cold water, do so in warm. But if you have neither, pour out water three times upon the head into the name of Father and Son and Holy Spirit.” (chap 7).
Thus a document from apostolic times and practices is consistent with Mt 28:19. To claim Mt 28:19 is a forgery is baseless.