I do suspect that the statement, if it is held as a belief by someone, would suggest to me that the person who thought their spouse was surely going to hell, would not have married the person to begin with.
But come now, I don't believe in hell except right here on earth, but I don't think we ought to engage in dissing one another's beliefs.
Next thing you know we will segue into circumcision,,,and believe me you don't want to see what happens on a thread that goes there.
I personally would hate being married to someone who thought I was for sure going to hell,,it would drive me nuts. But I would also hate to think people were going to hell who lived otherwise blameless lives. I don't much like the concept of hell, really.
Or whether there is any group who are "God's Chosen People".