He was left to die in harsh conditions but he survives.
He was born in royal family.
He was later adopted by royal family.
He kills his father and marries his mother unknowingly as fate befalls him. He tries to to do good things but his destiny fails him
Explanation:
Oedipus is ancient greek story of a man who is prophesied to kills his own father and then marry his mother. He later blinds himself and asks for an exile.
I think the Arabs think that Santiago and the alchemist are spies. They allowed Santiago and the alchemist to keep the treasure because both have claimed that treasure doesn't have to be something material. The treasure can be something spiritual.