Complex sentence: Author Thomas Harrison wrote that Anthrax played metal at a faster tempo because of its punk influences, noting the group's "antimetal stage persona" with "bright clothes more fit to surf culture than to metal".
Split into simpler sentences: Author Thomas Harrison wrote that Anthrax played metal at a faster tempo because of its punk influences. He noted the group's "antimetal stage persona" because the members were wearing "bright clothes more fit to surf culture than to metal".