Those folks have hacked the books of Maccabees out of their (abridged) "Bibles". That's far more offensive than when they ignore the passages which they haven't hacked out (but which refute their false doctrines).
THESE folks didn't do that.
The Bibles they use, as the Bibles that Jews and Catholics use, all three, came down by Tradition. Each have their Traditions and cling to them.
It is true that without 2 Maccabbees, there is not in the Bible the clear and explicit reference to prayers of atonement for the souls of the departed. It is also true that this was THE SPECIFIC THING that Luther really was alarmed about in the so-called "Apocrypha". But what of it?
The Jews use an abridged Bible, as do the Protestants, Catholics do too, as compared to the Orthodox, and all do as compared to the Ethiopian Abyssinian Church.
Gehenna's in the King James.
The DEFINITION of Gehinnom isn't in the Bible at all.
2 Maccabbees makes the Jewish understanding in the Oral Tradition into text, but if one is using an abriged version of the Bible and doesn't have the benefit of access to 2 Maccabbees, there's still the bare fact that Jesus repeatedly referred to Gehenna and didn't define it or correct the Jewish tradition. Which means that the Jewish tradition on the subject was right, or else Jesus wouldn't have taught it explicitly, uncorrected.
I am going to get fired here on earth if I don't knock this off until this evening.
Don't be too mad at the Protestants, just as they shouldn't be too mad at us. We're each using the books our traditions say are holy. To talk with them, it's best to refer to the books they accept. It's ok to reference the books their forefathers excised, because that brings to the fore, again, the matter of authority.
In truth, the number of people, Catholic and Protestant, who beat each other over the head over the matter of the Apocrypha probably exceeds the number of those same people who have actually READ the entirety of the Bible by a factor of two.
People like to fight. Blessed are the peacemakers.