According to Fundamentalist Christianity (both regular and frummy); Hell/Gehenna (The Christian Inferno) is the default destination for the human soul due to having a "Sin Nature". "Hell" isn't a punishment for any crime but simply the result of existing without Christian Salvation.
Yes; That sounds awful. I agree. It is also a bogus invention based on mistranslation and social control.
However; The original texts do NOT say it's eternal. Therefore; The stuff mentioned above is simply an invention of the Early Church to scare people into the pews.
Eternal Damnation is an exclusively Conservative Christian invention. Other, older religions have some version a Paradise & Inferno as well....
* The Greco/Romans had Tartarus (Hell), Hades (Bland Afterlife for most) & Elysium (Heaven for the really awesome).
* Hinduism has The Swargas (7 Heavens), The Patalas (7 lower levels for the more 'fleshly'-inclined), and The Narakas (The Hells. Though the different sects and Puranas can't seem to decide on how many levels. I personally think it should be 7 levels to match the Swargas and Patalas since they also match up with the 7 Main Chakras....or energy centers....in the body.).
* Buddhism (well, the more spiritual varieties) has stuff like the 8 Hot Narakas, 8 Cold Narakas, 8 Heavens (Tibetans believe there's 5), Shambhala (Like Heaven or a Heavenly State), The Pure Land (Heavenly realm in Pure Land Buddhism).
There's more and most take on a "Hell is a temporary Purgatorial thing" approach.
Judaism is mostly mum about the hereafter (they simply refer to the After-Death sate as Sheol). Islam varies between "Temporary" and "Eternal".
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What was my point in all this? Well....The "Hell is temporary" crowd is more numerous and has more seniority therefore the "Hell is eternal" crowd, like the OP, here is preaching pure "Bantha Poodoo". Even the earliest Christianity didn't buy it. In the original Koine Greek, it simply said Hell was a temporary stay and they may even have been open to the concept of Reincarnation.
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It seems all faiths were less stupid in their Salad Days and they tended to be less complicated and bigoted. The earliest Christianity was proto-Feminist. The earliest Hinduism was more egalitarian concerning Women, The Castes, etc....
I think if folks want these religions to stick around; They need to embrace Reason as well as Faith, adapt with the times and start all over again fresh and look to the earliest days.
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"The God of Fire and Brimstone" is a boatload of bogus bullcrap that should burn in Naraka and stay there! SCREW THE DEMIURGE!