We do know that James and
Jude did later on.
Would you agree then that something
is wrong with scripture concerning these blood brothers,
and that this scripture contradicts, and is not inerrant?
Would you agree to that premise upfront?
If you’re gonna try the Mary of Clopas angle it doesn’t work.
But you can't because the Greek and other supporting Scripture don't state it.
Go ahead; if you can do it without Rome's spin.