Ever seen animals? A dog, a lion and even a jackal, he is the only male in his locality, but prefers to keep quite a number of females. Once his kids grow up, he kicks out the males (his sons) from his locality and tries to bring in more females so that his genus could spread more. His endeavor is that most of the offspring will be his. When a new male takes over his throne, this new male kills the last kings offspring but keeps all the females, so that only his children will be born. Humans does the same thing, only in a different way. Humans convert other religions and tries to to spread his religion. Animals and Humans have different ways only intentions are similar, to spread out their religion, their clans and their genus. Ha! That is why its said that in each human there is an animal.