That's got to be some kind of heresy that Catholics have a label for.
That then, makes the second person of the Trinity a created being. That says that the second person of the Trinity is not eternal and that Mary gave him is divine nature.
It makes him not God, because GOD has no mother.
The Incarnation of the second person of the Trinity did.
In as much as she has a relationship with God she is the greatest of God’s creatures.
No, she's not. Jesus said that there was no one born of women who was greater than John the Baptist. The Catholic church teaching otherwise, that Mary is the greatest, it teaching error as it directly contradicts Scripture, the very words of Jesus that so many Catholics esteem more highly than anything else found in the Bible.
Additionally, anyone who is born again by the Holy Spirit has a relationship with God. It's not just Mary. His grace, the same word as the angel used in his greeting to Mary, is poured out on ALL those who believe, who are born again. She's no more special than any other human being whom God has saved because God is not a respecter of persons.
She does not preexist with God before the foundation of the world.
If she gave birth to God, she does. And saying that she's the mother of God says that.
Their focus is always on man. They claim that it,s through Mary that their salvation comes. She gets the credit for bringing Christ into the world rather than God.
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>>>That then, makes the second person of the Trinity a created being. That says that the second person of the Trinity is not eternal and that Mary gave him is divine nature.<<<
Coming back here I’d like to fix this misunderstanding.
Once again, You are dead wrong to say that Mary as Mother of God entails that Mary must have pre-existed with Christ.
Firstly, it is inconceivable that Mary could have pre-existed before humanity, or that the second person of the trinity assumed the form of a man before creation. Neither of these realities are possible. Mary could no more be pre-existent before creation than creation itself. She is the Mother of God Nonetheless.
The very point is that Christ assumed humanity once he came into the world. This led to the salvation of all men. It is not something that can be said, that at any time after he has assumed humanity he is not fully God and fully Man.
To dispute this because Mary is only a creature and not God is inconceivable. At which point in his life on earth was he not fully God and Fully Man in one divine person?
Would it not be easier to say that He was not God during his humiliation on the Cross? No. At No time has Jesus ever not been God. The life of Christ after his birth into the world is not as a separated being but a unified one. A Hypostasis. Since he is never not also God after assuming his fleshly humanity. God breathed with the lungs of a Man. God felt the Joy a human person feels, and experienced human hunger and suffering. And because He was God his propitiation for sin on the cross can extend to everyone who accepts Him. Therefore, because Mary gave birth to the humanity of Christ she gave birth to God who is united to His divinity.
At No point in his entering into creation can he be said to not be God. Jesus was, is, and always will be God.