Glam!? Easy brotha......keep things in context, we are talking 1982/3! Spandex...(black and red), bullet belts, black makeup under the eyes even fringed or shredded jackets were considered TOTAL METAL at the time.
Slayer were f'n brutal and beyond evil heavy at the time, posers and Top 40 crowd were scared shitless of them! lol ahhh good times....