Why does Lord Vishnu not prevent Lord Shiva and Lord Brahma from giving boons to Asuras?

 This is because of the roles of Trideva.

Hero doesn't stop director or script writer from making villain a powerful character that would create chaotic situations in film.

What does that mean?

Let me explain it by simplifying it and explaining it in layman's language.

I really enjoy explaining about the world and Sanatan Dharma by simplifying it as a movie. Even Niralamba Upanishad states that this world is not real, the only Reality is God (ब्रह्म सत्यं जगत मिथ्या). One Eternal Consciousness is Real, otherwise Maya that takes us away from non-duality and keep us attach to this world.

Let us consider the world as a film. We need to understand the roles of Brahma, Vishnu and Shiva. We have 33 Koti Devi Devtas and each of them have different roles though there is one Ultimate Consciousness Para Brahman that has these many forms.

So Brahma is the creator, which means he is the script writer ✍️, He is Vidhata and he is the dispenser of the destiny of all the characters including positive and negative.

Now since the writer has to prepare a fair script, giving the scope to all characters, Brahma does give the boons to Asuras in that sense.

Then we have the Preserver, Vishnu. He is Bhagwan, the central character, the lead hero of the movie.

यदा यदा हि धर्मस्य ग्लानिर्भवति भारत।
अभ्युत्थानमधर्मस्य तदात्मानं सृजाम्यहम्॥ (4.7)
परित्राणाय साधूनां विनाशाय च दुष्कृताम्‌।
धर्मसंस्थापनार्थाय सम्भवामि युगे युगे॥

Whenever Adharma dominates, He incarnates in various forms, defeats the Asuras and establishes Dharma. This is the exact work of a hero, Vishnu as Varaha slays Hiranyaksha.

As Narsimha he slays Hiranyakshap.

As Parshuram he slays Sahasra Bahu.

As Shri Ram, he slayed Ravan, Kumbhakaran and others.

As Shri Krishna he slayed Kansa, Shishupal and many others.

And in his last incarnation as Kalki, he will again defeat the evil and restore the order of the world.

So Vishnu is the main hero while Indra and other Devtas are the supporting characters. You will never see Vishnu giving boons to Asuras because he is the hero who has to defeat the villains.

Now let's come to Shiva. He has an entirely different role although. He is Ishwar. He is the main director of the film who has the authority of running this world in the way he feels like.

A director is also like hero but in a different way. Hero has to directly fight with evil characters and defeat them. So Vishnu enters the system and brings order and balance. But Shiva is more transcendental in a sense that he remains out of the system, he remains in Samadhi but has his third eye open to see the world, just like the director monitors every scene from behind the scenes.

A director does not differentiate between hero and villain when it comes to providing them the roles. He has to provide role to every character, so in the film, villain also has the scenes where he is dominating the good characters, just like Asuras after getting boons would defeat Devtas and capture Swarg Lok. So everyone worships Shiva, be it Devtas, Asuras, Rishis, Munis, or all others. Every character, either positive or negative has to maintain good relationship with the director.

So it's not a wrong thing done by Shiva or even Brahma. This is the role of the main director and also of the script writer/casting director to assemble the characters in film and give them their powerful roles.

So Mahadev is the one who can even change the script written by Brahma, like if director wants to make changes in script, he can definitely do that. Just like Rishi Markandeya was supposed to live only for 16 years, but since he being a positive character showed his potential and was a great devotee of Mahakal, he got the boon from Shiva and was saved by him from Yamraj. Similarly negative characters also got some or the other boons depending on their potential and Tapasya they did to impress the director Shiva.

So Vishnu doesn't stop Brahma or Shiva from giving boons to Asuras because none of them are wrong. They are all knowing and do their work.

Since the hero is the dearest character of the director and in the end of the film, the director would definitely support hero only. Hero is the exact projection of director's idea about the film and perhaps hero is the one who makes director's film hit and hero also needs director to thrive in his role. Director and hero complete each other.

So Narayan is the dearest of Shiva and that's why they always support each other.

So I hope my answer would help in understanding Sanatan Dharma better with the help of cinematic perspective.

Jai Brahma 🙏Jai Vishnu🙏Jai Mahesh 🙏

Who are the greatest Asuras of Indian epics?

 The strongest asuras are as follows :

Madhu and kaitabha :

• They are created by Vishnu from two droplets of water
• They covered the entire universe with darkness and stole the vedas from Brahma
• Vishnu slayed them using Vaishnavastra and recreated the three worlds using their corpses .

Hiranyaksha and Hiranyakashipu :

• They both terrorized the universe and defeated everyone except Trimurti
• They were slain by Varaha and Narasimha

Ravana Kumbhakarna :

• They defeated all the gods combined and conquered the three worlds
• They were finally slained by Rama avatar

The end

Why do Asuras worship Lord Shiva?

Asuras are a class of divine beings or power-seeking deities related to the more benevolent Devas (also known as Suras) in Hinduism - Wikipedia.

Who are Asuras? Why are both Suras and Asuras devine? Why are Asuras symbolized as more powerful than Suras? Why do Suras and Asuras transform from one to antoher?

Why does Vishnu takes Mohini form and ensures that only devas get Amruta and become eternal and Asuras, who too participated in Samudra Manthan, don’t get it?

Why are killing of Asuras important part of Hindu festivals?

Why are gods Agni, Varuna, Rudra and Indra also glorified as Asuras in Rig Veda?

To understand the mysterious role played by Asuras in Hinduism, we must realize that human beings are created to use seven stage muscle tone based thinking and all scriptures are about the seven stage thinking mechanism only.

For an idea to become an action the idea has to pass through the seven stages and indicate that the idea is compatible with all other ideas of life.

However, an idea may stagnate at any stage and refuse to become an action. Then we would become totally helpless.

It is here that Asura steps in and converts the incompatible idea into a successful action.

It is for this reason that Asuras always shown to be phyisically more powerful than gods.

Why is Shiva associated with Asuras?

Brahma is a god of thinking, Vishnu equally good for thinking and action, and Shiva is a god of action. Thus, it is at Shiva stage that the idea is either converted into an action or allowed to get abolished. It is abolition of ideas at Shiva stage the reason why Shiva is associated with grave yard.

However, Asuras can still convert such incompatible ideas, to be abolished, into action. This would tide over the crisis. However, if this is unregulated then all activities of our life would become incompatible among themselves.

Asuras are powerful and uncontrollable. They are divine because they enable us to tide over a crisis. However, in the long run they would be disastrous. It is for this reason that they are supposed to worship Shiva, the most powerful Hindu god and the god of Logic.