"We have no evidence that Mary had other kids."
"Scripture alone does not speak definitively on the subject."
"James was NOT Jesus' blood brother..."
Let's see if there is a problem with the conclusion from the two proposotions.
Ah, it must be that tradition thing again. Tell you what, I'll stick with the common sense understanding of brother as used by Mark, Luke, John and Paul and tangentially by Jude. You use whatever you want.
Doesn't it strike you as odd that this common sense was lacking until very recently?
That's your perogative. What I wonder about is why do you actually care what I believe about Mary?