Old and New testament hells
Biblical reports of hell vary considerable between old and new testament.
Hell is mentioned in the bible 31 times in the old testament, and always in terms of 'sheol' the hebrew word meaning hades, or simply grave. It is not a place of suffering, just a place where the dead go. That's all dead, whether you've been good or bad.
Enter Jesus, and the new testament. Now there is a proper Hell with lakes of fire, burning sulphur, eternal torment. I mean seriously - what a bastard! I prefer the old testament version if I had to choose.
Why would Jesus and God invent something so terrible as Hell as a punishment? If Christians are supposed to favour the New testament over the Old, because Jesus died for their sins, and not we live in grace, Why did he feel like belief in Jesus wasn't enough on its own, and have to add a massive spanking stick in the form of "and if you don't believe all this, you're now going to burn in hell for all eternity".
Given that from the time of Jesus, through history, more people have not been Christian than have (including many millions who never even heard 'the word' of god before they died, so never stood a chance of salvation), god has basically decided to create a huge pit of suffering and fairly arbitrarily plunge people into it.
Seriously, do Christians actually consider this stuff? It's crazy.