BTW, does it not bother you that you are using a Muslim hoax to try to defend YOPIOS?
Not surprising, that's just about how strong the foundation of YOPIOS really is.
Dr. Rochelle Altman wrote (in part): >Marginalia, by definition, is material added *after* a text has been written. (Corrections are after the fact, too. Sometimes they are contemporary - but only sometimes!)
She herself admitted that sometimes there are contemporary additions after the fact.
The addition of something, even if it is in another hand DOES NOT PROVE OR EVEN SUGGEST A "HOAX".
Are you arguing that the well-respected Biblical Archaeology Society doesn't have THEIR "Dr. Altman" with equal credentials and expertise, that examined the same inscription, saw the same things, but vouched it passes muster?
I understand your desperation to make this be "a hoax". So much of what you believe is riding on it not being authentic. Your core problem is that it VERIFIES what the Bible already says. That James was the brother of Jesus Christ.
Now, if it said something NEW or DIFFERENT, you'd have stronger ground. But your problem is, it CORROBORATES the Bible.