That the early christians didn't have the concept of the trinity.
I'm not so sure about that. By believing that Jesus was worthy of worship, they were stating that they believed that Jesus was devine, Deity.
John 20:28 And <kai> Thomas <Thomas> answered <apokrinomai> and <kai> said <epo> unto him <autos>, My <mou> Lord <kurios> and <kai> my <mou> God <theos>.
Acts 7:59 And <kai> they stoned <lithoboleo> Stephen <Stephanos>, calling upon <epikaleomai> God, and <kai> saying <lego>, Lord <kurios> Jesus <Iesous>, receive <dechomai> my <mou> spirit <pneuma>.
2 Timothy 1:2 To Timothy <Timotheos>, my dearly beloved <agapetos> son <teknon>: Grace <charis>, mercy <eleos>, and peace <eirene>, from <apo> God <theos> the Father <pater> and <kai> Christ <Christos> Jesus <Iesous> our <hemon> Lord <kurios>.
Matthew 2:2 Saying <lego>, Where <pou> is <esti> he that is born <tikto> King <basileus> of the Jews <Ioudaios>? for <gar> we have seen <eido> his <autos> star <aster> in <en> the east <anatole>, and <kai> are come <erchomai> to worship <proskuneo> him <autos>.
Of course the Bethel boys say that was not actually worship but a type of courtsey. If that were true the same word would not have been used here;
Satan to Jesus; Matthew 4:9 And <kai> saith <lego> unto him <autos>, All <pas> these things <tauta> will I give <didomi> thee <soi>, if <ean> thou wilt fall down <pipto> and worship <proskuneo> me <moi>.
So even though the early Christians did not use the term Trinity to describe the Godhead, they did believe in the Deity of Jesus. To be called the "son" of something in Hebrew was to be called that thing. Jesus was called son of God, and son of man.