It's quite easy, it's music for the dead soul (demons). This isn't any different than Marilyn Manson or those Death metal bands of the late 80's.
If the drain is the hole to hell, your wrong, these fools jumped right in. At the end of the day, the 90's wasn't much better, they had hardcore horrorcore rappers back then. While Uzi isn't horrorcore to the core, he fits this emo demon rap that Atlanta nikkas ran with about 5-6 years ago. At the end of the day, all of this emo styled hip hop was birthed by Kanye West.