Religion also helps to establish order, morality & ethics in our society. It guides people on the path of Goodness.
It also warns rascals who deliberately meddle/create problems for others by the Hiranyakashipu example, where Goddess Durga cuts off the head of mahishasuran. So religion serves many purposes in this world to establish order.
Cheers
Every religion seeks to establish what
its believers think to be order, morality and ethics. This differs from region to region, religion to religion. The
thaatti chettu pilla theyyam is devil to us. However, all forms of theyyam is divine to certain communities.
Each religion has its own morality, ethics, linked around its own sense of divinity. Bride-kidnapping, and Child brides are good in morality to some; a sin to others.
Morality also depends on reasoning. See the reasoning for menstrual blood in
Vashista dharmashastra V.7 (it is based on the episode of Indra murdering the naga-brahmin Vritra). Other religions will not accept such a reasoning. So you see morality is not an absolute entity common to all. Nor is divinity.
Each religion had to
demonize (ie., portray) gods of other or older faiths (in a particular manner). Here demonize means that which will harm the worshiper or send the worshiper to hell. No one knows if such things are true. However, such beliefs are propagated because some think their own way is
the way; and those of others is
not their way; and so want to establish
what they think is morality, order, ethics and so on.
God Baal became demonized. Varuna became demonized. Mitra religion became demonized (by Romans to establish Christianity).
In Srilanka, there is a difference between two types of Demons. One is a set of angry beings, which need to be appeased to deliver good results (same way as we pray to Shani Bhagavan to not harm us). This is called Demonism. Another is a set of Demons which are considered Devas (Gods). Note
this. All those we think of Devas today were once not considered Devas by a group of people. There is a lot of historical context in all this, the way it all evolved.
So you see, there is no such thing as a Satan, a Demon; or an entity that is
considered evil. It is simply the way things were portrayed. Each one's
goodness (from the religion pov) is different from the other.
As for Durga and Mahishasura, do note the Asura (aka Asur) tribe goes into mourning:
a)
Here, kids behead lions and Durga Puja is a period of mourning - Times Of India and
b)
Indian Royalty, Maharajas and more........: Asuras of Today: The Bloodline of Mahishasura
There were no rascals. Only the strongest won and got to write history (and portray things as per their wish. If they did not demonize their opponent or the opponent's Gods, even if they won, people of the defeated territory would have continued to eulogize their king or worship their gods -- a huge source of strength; which the victors wud not want).
For what we think to be self-realization, all this (which is part of religion) is not required.