>[..]In Vedas, too, it is mentioned that Sudras are created from the feet of Purusha[..]

That is the varna system. There is no caste system in Vedas or in Hinduism.

The same verse from Purusha Suktam also appears in Zoroastrian Avesta Yasna and the Pahlavi Denkard.

‘Caste’ comes from ‘Casta’, a Portuguese word.

Now…what does it mean by allocating different parts of the body to different categories of people?

‘Purusha’ is the cosmic man. Before the gods were created, there was Purusha. The gods themselves came from the sacrifice of Purusha. The immortality of gods was granted to them because they were willing to sacrifice themselves for the mortals/humanity. So every time they perished, they were resurrected.

The concept of yagna in Hinduism symbolises the sacrifice of the gods. Vedas say that our lives too are a sacrifice. We live and we die. We merge with a universal consciousness. When we are no different from this universal consciousness, we are resurrected too. That is the principle of reincarnation. In sacrifice, we will find our resurrection.

The sacrifice of a god and the resurrection of said god is a recurring theme in many faiths and religions.

The Purusha Suktam is a poem about sacrifice of The Cosmic Man. He has a thousand heads and a thousand limbs. And how his sacrifice comes down as the five elementals of fire, air, earth, water and space. From these, all of creation is born..as earth and skies, planets and stars, forests, oceans, land forms. This disembodied Cosmic Man enters as sunshine and rain. Plants, mammals, birds and insects are created. And then so is man..sun becomes the soul and moon becomes the mind. Seven sheaths of gross matter is formed as the physical bodies..from his body, the four varnas are created so man can create division of labour. Nowhere is caste mentioned. Nor do the Vedas ask people to discriminate against each other.

A Brahmin lives on charity and studies Vedic knowledge for teaching and for the world benefit. A Kshatriya takes that knowledge and implements it as a ruler. A Vaishya takes care of the material needs that fuels the system. The Shudra works and creates what society needs.

The varna system reflects the four purusharthas: dharma, artha, kama, moksha. The Brahmin has to uphold Dharma(divine law). The Kshatriya has to deliver artha(material goals) according to Dharma. Vaishya and Shudra are motivated by artha and kama(material goals and desires). Moksha is for anyone who seeks it..and hence for everyone.

Brahmin lives on charity but is bound by religious rules and regulations. Kshatriya has power, but also has duty. Should be ready to fight and die to protect his people. Vaishya is free to accumulate wealth but also has responsibility to fund the entire society. Shudra only needs to work to take care of his desires, has to bear burden of labour and owes nothing to anyone. This system worked as there were many small manageable kingdoms and there was conformity. Conformity means less conflict. There was mobility between small kingdoms that if one was allergic to the homogeneity, there was another place to belong to..until the Muslim invaders came first abs then British raj came and got rid of the kingdoms.

Now Brahmins had to work and Kings were useless. Merchants were burdened to pay dictators and invaders and colonial masters. Resources were diminished and there was no more fair redistribution of available resources. It was a survival game now. The solid foundation and implicit safety net was gone. Every one of the varnas has one benefit and one handicap. So each one depended on the other three and peaceful balance was easier to maintain.

It’s like a game of Jenga. Take away one piece and everything comes crumbling down. Invasions and colonialism keep pulling pieces all the time but the system was self healing. Until it wasn’t.

You are mistaken. There is no caste in Hinduism. Purusha suktam is about the sacrifice of The Cosmic Man. It appears in the Rig Veda and also in other religions of that time. Hinduism is the only surviving polytheistic religion. It draws ire because of it’s very existence. It’s a threat abs irritant to the monotheistic faiths because of its foundational difference of opinion wrt individual soul, consciousness and it’s place in the universe.

Monotheism cannot erase Hinduism although there has been efforts to tarnish its core. Yes..Purusha Suktam is part of Hindu scriptures. Varna is mentioned. Caste isn’t. Social edits to a religious text is someone else’s responsibility. That is collateral damage due to civilizational pressures.

Hinduism is not for everyone. And that’s ok. There are many religions in the world. And different faiths. As well as atheism and agnosticism and ignosticism. But I don’t think a casual assassination of the Hindu faith that is followed by approximately one billion people is warranted or should be condoned due to incomplete religious literacy.