Gods usually attract believers two ways—intimidation or enticement.
Intimidation was practiced by the side of the Lord of Glory. Any who did not believe in the Lord shall be cast to hell. As with enticement, that was even more simple: believe in me and I shall grant you eternal life.
That line was not a lie.
From a logical perspective, so long as the Lord of Glory lived, the believers would never die. If the Lord of Glory were to perish, then the believers would have lost their object of worship. With their faith lost, so would their eternal life be lost.
It was not a lie, but it was indeed a trap.
The Lord of Glory needed only to keep himself alive and he had no need to care about his believers' wellbeing. There was little point for him to have concerns for others when he was no longer around after all.
