What? Your theory that James was the blood brother of Jesus is the same theory as Helvidius, which St. Jerome refutes.
Frankly, I believe Jesus had younger brothers and sisters as was to be expected of a normal Jewish marriage.
However, I did not state this in my post #869.
James - older or younger than Jesus?
I did raise some questions which you made no attempt to answer.
Please note: "(Of course this is assuming Joseph ever had any children and was also, as according to Jerome, a Perpetual Virgin."
I stated no theory. To the contrary, I stated a fact.
Jerome believed Joseph was also a Perpetual Virgin!