RESPONSE:
Because the clear preponderance of the evidence shows that Jesus was not an only child.
As I answered earlier. If Mary the wife of Clopas is Mary’s sister, that would mean there were
two daughters named Mary in the same family. No, if Mary had a sister, it’s much more reasonable that she is the Salmone mentioned in similar passages.
Mark 6:3 “Is not this the carpenter, the son of Mary* and **brother of James and Joses and Judas and Simon, and are not his sisters **here with us?’” (NRSV)
It is not a “mortal sin” to reject
errors in the Church’s interpretation of scripture. Such as:
“…by command of His Holiness and of the Most Eminent Lords Cardinals of this supreme and universal Inquisition, the two propositions of the stability of the Sun and the motion of the Earth were by the theological Qualifiers qualified as follows:”
"The proposition that the Sun is the center of the world and
does not move from its place is absurd and false philosophically and formally heretical, because it is expressly contrary to Holy Scripture. "
"The proposition that **the Earth **is not the center of the world and immovable but that it
moves, and also with a diurnal motion, is equally absurd and false philosophically and
theologically considered at least erroneous in faith. "
Do you belief that?
However, the “mortal sin if you don’t believe” ploy keeps many gullible Catholics gullible.
And you haven’t answered, when do we first find the claim of the “perpetual virginity of Mary”? Can you find it earlier than the 4th century?
Before that Jesus had brothers and sisters. But then Jerome, using very poor arguments, changed them into cousins because he didn’t like sex.