Why do many Muslims believe hell is not a literal place?

Many Muslims believe hell is not a literal place as the Quran uses extreme and unrealistic conditions, “Garments of fire will be tailored for those who disbelieve; scalding water will be poured over their heads, melting their insides as well as their skins…” Muslims who believe the punishments in hell may be metaphors would state that the metaphors pain and torture, are used to install fear of Jahannam in Muslims.