Looks like the early Christians believed Jesus when he warned about Hell over 40 times. Why don't the JW's do the same?
From “The Epistle of Barnabas” (70-130AD)
Barnabas, was the associate of Paul who is mentioned in the Book of Acts. The letter was written to new converts to Christianity:
The way of darkness is crooked, and it is full of cursing. It is the way of eternal death with punishment.
From Ignatius of Antioch (110AD)
Ignatius was a student of the Apostle John, and succeeded the Apostle Peter as the City Overseer of Antioch. He wrote a number of important letters to believers in churches in the area:
Corrupters of families will not inherit the kingdom of God. And if they who do these things according to the flesh suffer death. how much more if a man corrupt by evil reaching the faith of God. for the sake of which Jesus Christ was crucified? A man become so foul will depart into unquenchable fire: and so will anyone who listens to him. (Letter to the Ephesians 16:1-2)
From Clement of Rome (150AD)
Clement was the City Overseeer of Rome from 88 to 98AD, and his teaching reflects the early traditions of the Church. “Second Clement” reportedly a recorded sermon, and Clement discusses the nature of Hell:
If we do the will of Christ, we shall obtain rest; but if not, if we neglect his commandments, nothing will rescue us from eternal punishment (“Second Clement” 5:5)
But when they see how those who have sinned and who have denied Jesus by their words or by their deeds are punished with terrible torture in unquenchable fire, the righteous, who have done good, and who have endured tortures and have hated the luxuries of life, will give glory to their God saying, ‘There shall be hope for him that has served God with all his heart!’ (“Second Clement” 17:7)
From “The Martyrdom of Polycarp” (155AD)
This work was written by an Early Church Leader (unknown author) and is dated very early in the history of Christianity. It describes the death of Polycarp, a disciple of the Apostle John, and also describes early teachings of the church:
Fixing their minds on the grace of Christ, [the martyrs] despised worldly tortures and purchased eternal life with but a single hour. To them, the fire of their cruel torturers was cold. They kept before their eyes their escape from the eternal and unquenchable fire (“Martyrdom of Polycarp” 2:3)