Complex sentence: He became ruler in June 530 after deposing his first cousin, two generations removed, Hilderic, who had angered the Vandal nobility by converting to Catholic Christianity, as most of the Vandals at this time were fiercely devoted to Arian Christianity.
Split into simpler sentences: He became ruler in June 530 after deposing his first cousin, two generations removed, Hilderic, who had angered the Vandal nobility by converting to Catholic Christianity. Most of the Vandals at this time being fiercely devoted to Arian Christianity.