Christians seems to confuse the "unquenchable fire",
with eternal torment... but an eternal fire does not
have to mean eternal torment for all the wicked.

These christians explain how such endless
torment does not apply.
https://www.ucg.org/bible-study-too.../the-wicked-will-be-completely-burned-up

of course there is specific exception made
for the devil, beast and false profit.
who get endless torment rather than death.
(Revelation 20:10.) NASB.

"And the devil who deceived them was thrown into
the lake of fire and brimstone, where the beast
and the false prophet are also; and they will be
tormented day and night forever and ever."

-Bulletproof and Waterproof don't mean Idiotproof.