Most likely, the Lord had a special thought for James the Just. The Lord Jesus Christ appointed him bishop of the Church of Jerusalem. Thus, a special activity fell to the lot of the apostle James: he did not travel with preaching to different countries like the other apostles, but taught and officiated in Jerusalem, which is so important for the Christian world.

Dear Unknown,

let us look at Galatians 1:19 , ” But the other of the apostles i saw none saving James the brother of the Lord.” This James is called the brother of the Lord as well but not the brother you are referring to as James “the brother” was already martyred in Acts 2:12, ” And he killed James, the brother of John, with the sword.”

Likewise, Lot is called the brethren of Abraham even though he was not a sibling but the nephew in Gen 13:8.

The whole bible is made up and then edited, by others, who had an agenda, like Constantine.

Christians believe that Jesus, the Son of God and the Messiah, is God. Since Jesus is God incarnate, then Mary, His Mother, is the Mother of God.
We believe that Jesus is both the perfect God and the perfect human. Mary gave birth to the man Jesus, but the Person of Jesus is Divine. Therefore, Mary can be called the Mother of God, because She gave birth to the One Who is equal to the Father.

No,YOU are wrong!

For one thing, there are many countries where we don't have a word for "cousins". We just use the word "brother" and add a few details if necessary. I'm from one of those countries so what is inconceivable to you is actually very normal to me, and to the people who spoke Aramaic, in Biblical times.

As for the perpetual virginity of the Most Holy Mother of God, you don't believe in its possibility, so what ?

Your point of view is only valid in your head. It is not going to shake the foundations of 2000 years of History and tradition.

You seem to have theological issues that are going way beyond etymology and doctrines.

All the best.