Think first of the parable of Lazarus and the rich man. And there are other proofs, which I shall post another time.
Which is exactly that. A PARABLE.
Jude 7 shows the symbolism of "everlasting fire" - Sodom and Gomorrah are totally obliterated. Nowhere to be found. Destroyed. Gone forever. If it was a literal everlasting fire, then S & G would still be burning today.