The hypothetical contradicts itself: if I could save everyone from being separated from God and his holy people for eternity, by not believing in said God, would I do it? If I'm trying to stop them from getting separated from God, that means I'm believing he exists and that I don't want others to be separated from him. So, how will I stop believing in God, if my belief in his Hell is what's driving me to save them in the first place?
inb4: the reason I reworded it "separation from God" is because, whether it's the torturous side of She'ol/Hell/Hades (
Luke 16:19-31) or Lake of Fire after the great white throne judgment (
Revelation 20:11-15) the wicked/unbelieving will be separated from the righteous, and thus God, because the righeous will be living with God (
2 Corinthians 5:6-8; Revelation 20:11-15; Revelation 21:1-8; Revelation 22:1-5) as they wait for their resurrection and after their resurrection; in She'ol, the righteous are with Abraham resting in comfort, the chasm separating them from the wicked; and after the resurrection, the righteous will be living with God face to face as new immortal creations, while the wicked, also having been resurrected, get cast into the lake of fire. Separation in death (though they both go to She'ol there is the chasm) and separation after the resurrection.
And because this can't be emphasized enough Hell (Hades) =/= Lake of Fire.
For comparisons sake, I'll quote from the KJV and NIV:
Revelation 20:14 (KJV)
14 And death and hell were cast into the lake of fire. This is the second death.
Revelation 20:14 (NIV)
14 Then death and Hades were thrown into the lake of fire. The lake of fire is the second death.
Unfortunately, even in most verses of the newer translations, the translators do not make a distinction in the English between Hades (She'ol) and Gehenna (Lake of Fire). Both are translated as "hell". Just a note to everyone, whenever you see "hell" in a verse make sure to check a concordance or an interlinear to see what actual place is being referred to in the Greek ("Hades" is the Greek equivalent of She'ol, while "Gehenna" is the Greek word referring to the Lake of Fire). That said, the torturous side of Hades/She'ol does seem to have fire as well, though the punishment seems to be the equal treatment you gave to others in your lifetime (comparing the rich man's punishment to how he treated Lazarus in real life: Lazarus was a naked, poor, homeless man sitting under the sun at the rich man's gate, starving; now the Rich Man can't handle the heat in She'ol, Lazarus is not crossing over the chasm to give him any water or relief just like the rich man treated him. Now Lazarus is in comfort while the rich man is in torture. Had he paid attention to the Law of Moses and the prophets he would've treated Lazarus differently and avoided that).