If you think Christianity is unique in this regard look towards Buddhism, specifically the Vajrayana branches (often associated with Tibet) and you’ll see even more gruesome imagery than any Christian symbolism. Buddhas drinking blood out of the skulls of their enemies, stomping on corpses, and having sex all at the same time, and even more shocking things. These"fearsome" or “wrathful” manifestation of Buddhist deities that display raw power and the trappings of demons to destroy said demons are relatively common. Religion is weird and powerful symbolism is often shocking.