All things being created through and in Christ Jesus is not referring to him having a hands on part in the actual creation itself but rather with the fact that it was only through God's plan and foreknowledge of Jesus' coming and perfect sinless life and his death on the cross for sin and his being resurrected by God, that God created anything at all while knowing in advance that sin would corrupt it all.
That's hardly a scriptural position, which says that "all things were created through him," not "some things."
John 1:3 "Through him all things were made, and apart from him nothing was made that has been made."
In other words, the future coming of Jesus to redeem and restore God's purpose for creating all things while knowing in advance that it would be corrected by sin, is the only reason why God in his righteousness could create the world and this is what is meant by "all things were created through and in him" and not that he was there with God creating them.
Whilst it is true that the humanity of Jesus was for the purpose of redemption, Heb 1:3 attests that the Word/Son also sustains all things. Jesus attested that he would regain the glory that he had before he came down from heaven John 6:62. To pretend that Jesus had no existence in heaven pror to the incarnation is to pervert his words and also distort the teaching of every apostle. He is the beginning of the creation of God (i.e. the ruler over God's creation). Rev 3:14, the first and the last: not the first as in the first to be conceived, but the first as in first existing, i.e. pre-existing.
I know and therefore the words "and the Logos was God" have to be understood by the definition of the word Logos itself and the Logos refers to the mind of God and God's mind is also God isn't it?
That is far too philosophical and anthro-morphological. You can't develop scriptural doctrine from Greek pagan philosophers. Logos is a Greek word having all kinds of different contextual meanings, both philosophical and non-philosophical. It's meaning is entirely contextual. Of specific import to the gospel of John is that it is a masculine word, whereas all other Greek words for "words" or "speech" are neuter. In John's gospel, Logos has a specfic application to the words or word of God, or testimony about God. It is thus presented as a living word in contradistiction to mere speech. That Word lived before Christ came down from heaven:
1Pe 1:23 "For you have been born again, not of perishable seed, but of imperishable, through the living and enduring word of God."
When it says "and the Logos was "pros" = with God", it is referring to God reciprocating with his own mind and thoughts or in other words "his thinking "pros" towards himself and in his foreknowledge of his plan to send Jesus to live a perfect sinless life and then to die on the cross for sin and in order to justify His creating all things and while knowing in advance that sin would corrupt his creation.
That is sheer anthropomorphism. Who are you to talk about the "mind of God" when you can't even conceive of God? Who are you to rule on what God was "thinking about"? Isaiah 55:8-9
8 “For my thoughts are not your thoughts,
neither are your ways my ways,”
declares the Lord.
9 “As the heavens are higher than the earth,
so are my ways higher than your ways
and my thoughts than your thoughts.
It is preposterous to define the Logos in such a way as you have defined it. What we know is that Logos existed alongside the Father and facing the Father: i.e. as one with the Father.
I am not at all interested in what people think about my grasp of things but only about what God thinks and what he reveals to me from the scriptures by the Holy Spirit and what people think about it, I leave up to God and them to deal with, for I am not saved to please men but only God alone.
You need to realize your personal blend of extreme unitarianism (Christ had no essential existence prior to his birth except as a concept) is as much dependent on Greek pagan philosophy and a rejection of scripture, as the extreme form of Trinitarianism which you purport to object to.