I would summarize the Mariolatry which may repeat some of the points again.
1. Mary, the Mother of God
No one can claim the theory of Mother of God unless she or he is obsessed with the devout goddess worship, because it contradicts Divine Trinity.
Mother of God theory started from Divine Trinty but it contradicts Divine Trinity again.
1) Mary is neither Mother of God the Father nor the Mother of God the Holy Spirit.
God the Father cannot be "the God" in the very phrase of Mother of God.
One may claim Mary is Mother of 1/3 Godheads, Mother of God the Son, but it is limited to a certain time after the birth of Jesus while the Divinity of God ( God the Son) is eternal. Moreover the divinity of Jesus was not produced by Mary. The Deity of God the Son was not given birth to by Mary, but it existed before Mary was born.
2) Nobody in the Bible called her like that.
3) Instead, the Hebrews writer denies Mother of Son of God ( Heb 7:1-5)
4) John, James, Paul, Jude, Peter must have outlived Mary, but none of them called Mary as Mother of God.
2. Immaculate Conception:
All human race are sinners, and everyone of Adam's race was born sinners. ( Romans 3:10-23)
Some Roman Catholics claim that Mary was protected from sins.
If anyone can be protected from the sins, why didn't God allow it to all the people on this earth?
If anyone can be protected from the sins without the Blood of Jesus, why didn't God apply that method to all the human beings so that His beloved Son wouldn't have to die the terrible death?
Why did Mary rejoice in her Savior ? ( Luke 1:47)
Why couldn't the Immaculate Mary understand what Jesus was telling to her? ( Luke 2:50)
3. Assumption of Mary
Why does the Bible keep silence about it?
Apostle John may have taken care of her during the rest of her life. Why does he keep silence about her in Gospel JOhn, Epistle John 1, 2, 3, Revelation? Was it because the assumption was so trivial thing to mention? Then why so many people are taught to believe it?
John, Paul, James, Jude, Peter must have outlived Mary, but they keep silence about her ascension, why?
4. Queen of Heaven
Where is such title in the Bible?
We can find this only in the paganism mentioned by Jeremiah.
Jeremiah 44
15 Then all the men which knew that their wives had burned incense unto other gods, and all the women that stood by, a great multitude, even all the people that dwelt in the land of Egypt, in Pathros, answered Jeremiah, saying, 16 As for the word that thou hast spoken unto us in the name of the LORD, we will not hearken unto thee. 17 But we will certainly do whatsoever thing goeth forth out of our own mouth, to burn incense unto the queen of heaven, and to pour out drink offerings unto her, as we have done, we, and our fathers, our kings, and our princes, in the cities of Judah, and in the streets of Jerusalem: for then had we plenty of victuals, and were well, and saw no evil. 18 But since we left off to burn incense to the queen of heaven, and to pour out drink offerings unto her, we have wanted all things, and have been consumed by the sword and by the famine. 19 And when we burned incense to the queen of heaven, and poured out drink offerings unto her, did we make her cakes to worship her, and pour out drink offerings unto her, without our men
Calling Mary the Queen of Heaven will bring the blessings to the people?
But God says this:
12 And I will take the remnant of Judah, that have set their faces to go into the land of Egypt to sojourn there, and they shall all be consumed, and fall in the land of Egypt; they shall even be consumed by the sword and by the famine: they shall die, from the least even unto the greatest, by the sword and by the famine: and they shall be an execration, and an astonishment, and a curse, and a reproach.
5. Statue of Mary
This is apparently Idol prohibited in the Bible so many times. If you disagree, please check Deuteronomy 4 and Isaiah 42-48, and many other OT Bibles and Revelation 16-18.
16 Lest ye corrupt yourselves, and make you a graven image, the similitude of any figure, the likeness of male or female, 17 The likeness of any beast that is on the earth, the likeness of any winged fowl that flieth in the air, 18 The likeness of any thing that creepeth on the ground, the likeness of any fish that is in the waters beneath the earth: 19 And lest thou lift up thine eyes unto heaven, and when thou seest the sun, and the moon, and the stars, even all the host of heaven, shouldest be driven to worship them, and serve them, which the LORD thy God hath divided unto all nations under the whole heaven.
6. Mary, Mother of Church
Where is such heresy stated in the Bible?
Read Galatians 4:22-31, which tells us our mother is the Jerusalem symbolizing Sarah
Gal 4:
22 For it is written, that Abraham had two sons, the one by a bondmaid, the other by a freewoman. 23 But he who was of the bondwoman was born after the flesh; but he of the freewoman was by promise. 24 Which things are an allegory: for these are the two covenants; the one from the mount Sinai, which gendereth to bondage, which is Agar. 25 For this Agar is mount Sinai in Arabia, and answereth to Jerusalem which now is, and is in bondage with her children. 26 But Jerusalem which is above is free, which is the mother of us all.
Church is called the Bride of Christ ( Eph 5:22-25), if Mary is mother of Church, what is the relationship between Mary and Christ?
Church - Mary : Child and Mother, Mary herself is the Church ( Catholicism)
Church and Christ : Bride and Bridegroom ( Eph 5:20-25)
Mary and Christ ? - Jesus' mother becomes Bride of Christ ?
7. Prayer to Mary
Can she accept the prayers from 1.3 billion people all over the world, for 2000 years?
Why couldn't she understand what Jesus was telling her ( Luke 2:50)?
Is Mary Omni-present? She must be busy then ! Can she understand the prayers from various countries in hundreds of languages? Mary must listen to all the prayers from all over the world, from 1.3 Billion Roman Catholics. Only God can be OMnipresent to listen to the prayers from all over the world, for 2000 years !
When did the capacity of Mary explode such? Only in the minds of the goddess worshippers ! Devout goddess worshippers !