Original sentence: Because of this, they are considered "traitors" by some black metal purists.Behemoth are an influential Polish black/death metal band.They are considered to have played one of the most important roles in establishing the Polish black metal underground, alongside Graveland and Sacrilegium.This coincided with an increase in musical craftsmanship that allowed them to expand out of the black metal underground and garnered them with some international recognition.Until a few years ago, the band played rather classical black metal with a heathen lyrical content, but changed its image to a more satanic one
Edited sentence: Behemoth is one of the most revered Polish black metal and death metal bands.Behemoth played one of the most important roles in establishing the Polish black metal underground, alongside with Graveland and Sacrilegium.By some die-hard black metal fans Behemoth is called, alongside with Nergal, a group of traitors to the scene.This coincided with an expansion of musical craftsmanship that took them out of the mediocre black metal underground and garnered them international recognition.Up till a few years ago, the band played rather classical black metal with a heathen lyrical content, but changed its image to a more 'satanic'/occultic one, all due to the frontman, Nergal.With this, Behemoth is no longer heathen, underground, not even black metal (they play death metal now)