Catholics teach that the Son is the Creator along with his Father, do they not? Justin was no Catholic. Justin was more of a Jehovah’s Witness, but again I qualify this: I don’t claim he was and that he taught exactly as we do or that there are not significant differences. I bring up Justin because Catholics claim him as their own.
We do claim St. Justin to be our own, but (unlike you and your organization), we recognize that St. Justin was a Catholic Christian who lived in the 2nd Century, and so before the present theological/intellectual language of Trinitarian doctrine was formalized (which it was in response to the Arian error of the 4th Century). So, from the pov of mere form, Justin does not express himself as a modern Catholic Christian would, because he did not have the benefit of Nicene theological language. However, when it comes to substance, St. Justin is very Catholic in his theological understanding. The reason that you do not see this is because you are trying to use St. Justin’s Dialogue with Trypho as a proof text for your religion’s beliefs, rather than reading his dialogue in its correct, historical context. In its historical context, St. Justin is interacting with a professed Jew, and so trying to explain the Divinity of the Son in terms that a die-hard Jewish monotheist can understand and accept.
Now, in doing this, it is true that St. Justin takes certain approaches which would make a later, Nicene (i.e., Trinitarian) Christian a little uncomfortable, since what St. Justin says can be interpreted in an Arian way. However, the error of Arianism (the denial of the Son’s consubstantiality with the Father) had not raised its ugly head as yet (and would not for another two centuries), so Arianism and later JW “theology” are not even “on the table” here. What is “on the table” is the early Church’s belief that the Son is God, juxtaposed against the Jewish and equally-Christian belief that there is only One God. Therein lies the key to understanding St. Justin in historical context, as opposed to introducing anachronism and JW embracing of the same. For, St. Justin in no sense implies (as Arians believe) that there is more than one God. If St. Justin had expressed such a belief, his dialogue with Trypho would have come to a sudden and abrupt end, since Trypho would have (quite correctly) cast St. Justin’s faith as a species of pagan-style polytheism, and thereby established that Christianity cannot be reconciled with Mosaic Judaism. However, Trypho never does any such thing, for he sees no reason to do so. Rather, the dialogue continues because (and for the very reason that) St. Justin’s argument is, not that there is more than one God, but that the Hebrew Scriptures themselves recognize that the Oneness of God is, and can be, expressed in a pluralistic sense (i.e., the Church’s organic understanding of the Trinity).
Further, your own (faulty) approach plays directly into this principal, because, above you ask if the Catholic Church teaches that the Son is the Creator along with the Father. You then say that we do. But, it depends on what you mean by “Creator” and in what sense, for, in our Creed, we Catholics identify the Father alone as the Creator:
“We believe in One God, the Father Almighty, Creator of Heaven and Earth, of all that is seen and unseen.”
But, we also recognized, in this same Creed, that all things were made in and through the eternal Son:
“We believe in one Lord, Jesus Christ …One in Being with the Father, through Whom all things were made.”
We, of course, here are merely echoing the teaching of John 1:3, which says exactly the same thing:
“Through Him (the Word / the Son) all things were made; without Him nothing was made that has been made.”
You accept and recognize John 1:3 – in your own JW way, as has been earlier discussed. You believe that all things were created through the Son in the same way that we Catholics believe that all things were created through the Son (you just don’t comprehend His being consubstantial with the Creator). St. Justin Martyr believed this too, for he never denies John 1:3; just as we Catholics do in our Creed (and elsewhere), St. Justin (a 2nd Century Catholic) merely distinguishes between the Personal role of the Father as Creator and the “collaborative” role of the Son, through Whom all things were made by the Father. Understood (correctly and honestly) in its historical context; that is all we see at play in St. Justin’s Dialogue with Trypho the Jew. Your organization typically fails to grasp Catholic doctrine - and all orthodox Christianity’s -due to a limited understanding of history/orthodoxy.
(And isn’t it interesting that Justin writes to Trypho re Genesis 18:2 that is was the Son Who appeared to Moses, while your New World Translation identifies this encounter as between Jehovah and Abraham?)