Even I don't know what this means being the Beginning of the creation of God, you cannot refer to a few verses and make a point about this topic which you call the trinitarians. There are as well as many places that clearefies that Jesus is Lord and God. Amen.

In this instance the word "beginning " can be defined as "that by which anything begins to be, the origin, the active cause" as proclaimed in Colossians 1:17, "And he is before all things, and by him all things consist."