I doubt the rules have changed much on his watch. The basic laws regarding theft have stayed more or less the same in England on his watch. These ancient manuscripts did not belong to Obbink, they belonged to the Egypt Exploration Society and Obbink was merely employed to take care of them, and had no right to sell them. The facts seem pretty clear to me.
As another poster said, putting "hobby lobby" in the title was not meant to denigrate anyone, it is in fact the correct description of the facts because the Hobby Lobby company actually purchased the manuscripts.
As far as value goes, I am not sure how much these texts were worth, I doubt they were worth nothing. And obviously, low value is not an excuse for stealing. Unless the Egypt Exploration society completely disclaims ownership of the manuscripts (e.g., they toss them in the trash), these things are their property and cannot be taken, regardless of their supposed market value.
Now one can argue that the Egypt Exploration Society themselves stole the stuff from Egypt. That may be true, a lot of the ancient things in English museum are stolen, but I do not know the details for these particular manuscripts. If the Hobby Lobby founder had his museum in Egypt and put the manuscripts there he might call himself a heroic righter of historic wrongs, but he doesn't so that is not really an issue.
I am not sure exactly why are you complaining about bigotry.
BTW, for those that cannot read the nyt article, the NYPost more or less copied it.
https://nypost.com/2019/10/17/renowned-oxford-professor-accu...
Note to the NY Times: your paywalls are forcing innocent people to read the NY Post!