This "we" and "us" are the people stuck in Sheol that were freed by Christ before He ressurected.
They were fiannly able to be in God's Kingdom after Jesus freed them.
Catholic believe most of the early Jews were stuck in Sheol when they died. People rarely got into heaven because of their sins.
Sheol isn't hell, it's like a purgatory--a place of waiting.
and so the entire revelation cannot be included in the Quran because the Quran is meant for all of Mankind
The Gosple of Christ is mewant for all people, also.
The Gosple of Christ is especially for the unclean sinners like the prostitutes and other outcasts of society.
These are people even your god doesn't love!
I wish you'd see how empty your faith is when compared to mine.
Yes we do believe that the God of the Quran is the God of Abraham.
As Allah says in the Quran: