This I feel is according to the puranic stories that depicted Devas as fair skinned, without a Mustache (mostly) and Asuras with dark skinned, with Mustache (mostly). In the stories, Devas trying some cunning ways to defeat Asuras and Asuras trying some cunning ways to defeat Devas. Sometimes even for us like Indira deceiving Akalya, Ravana keeping Sita without touching her (even though many puranic stories tell that due to the curse of Vedavati) make to think that this is not fair. In Nectar (Amudham) drinking also, Mohini (Disguised Vishnu) giving first all nectar to devas. Seeing the partiality, one Asura went in the middle and drunk the nectar. Depicting Brahmins coming from Head and the fourth sect coming from Legs (This may be due to legs are more important to carry out work).Not allowing Non brahmins to study Sanskrit and Veda. There may be definite reasons for all these things. But the stories are often depicted by Brahmins only. Therefore it is the brahmins only perpetuated these stories without clearly explaining the reason behind this. When they got their own intelligence, even due to cross breed, they started questioning. Therefore it is better not to give more Weightage to these stories or give a proper explanation to each one of them.Hindus interest in stories (Listening, Writing, Speaking )only led to this.This May be due to members may have different views.This is a good forum for discussion. That is why I have put this here.