I think they want to know how he can be saved because he cannot speak or hear, and thus cannot repent for his sins before he dies, consigning him to hell.
It's like in colonial america, when dyptheria ripped through Puritan New England, killing unbaptised babies (because Puritans didn't do infant baptism), and these babies were thought to be consigned to Hell (it is interesting to note that this helped lead to the prevalence of Methodism and the Baptist faith in America).
I think they want to know how he can be saved because he cannot speak or hear, and thus cannot repent for his sins before he dies, consigning him to hell.
It's like in colonial america, when dyptheria ripped through Puritan New England, killing unbaptised babies (because Puritans didn't do infant baptism), and these babies were thought to be consigned to Hell (it is interesting to note that this helped lead to the prevalence of Methodism and the Baptist faith in America).