And we don't ? prove it with examples.
langer is here where all people gather to eat food while sitting together at the same level on the floor, as there is nothing lower than the floor.
gurbani says
॥: Jaanahu joti na pooshahu jaatee aagai jaat na he: Recognize God's Light (within all), and don't ask or consider Jaatee, as there is no Jaati in the world hereafter (sggs 349).
ਦੇਹੀ ਜਾਤਿ ਨ ਆਗੈ ਜਾਏ ॥ ਜਿਥੈ ਲੇਖਾ ਮੰਗੀਐ ਤਿਥੈ ਛੁਟੈ ਸਚੁ ਕਮਾਏ ॥: Dehee jaati na aagai jaae. Jitahi lekhaa mangeeai tithai chhuttai sach kamaae: Man's body and Jaati will not go with him to the world hereafter. Where one is called to answer for his account, there, he will be emancipated only by the practice of Truth* (sggs 112).
In the dwelling of the womb, there is no ancestry or social status. All have originated from the seed of God.*Tell me, O Pandit, O religious scholar: since when have you been a Brahmin? Don't waste your life by continually claiming to be a Brahmin. If you are indeed a Brahmin, born of a Brahmin mother, then why didn't you come by some other way?*How is it that you are a Brahmin, and I am of a low social status? How is it that I am formed of blood, and you are made of milk?*Says Kabeer, one who contemplates God, is said to be a Brahmin among us.” --- Guru Granth Sahib Ji (page/Ang 324) ---
Being a Sikh and being a Punjabi are two completely different things. peolple often get religion and tradition mixed Sikhs live in a society where 98% people are believe in castes
in Indian society castes are tradition and culture.hindusom and Sikhism is totally mixed up on India.. Sikhs starts to accept Hindu beliefs and some Punjabi Hindus go on gurudwaras and accept beliefs..majority faith always affect minority faiths..
same way Buddhism was not believe in murti poooja ..but now they have idol of budh. bcoz it totaaly affected by Hinduism
get right reference mahabharat vich samundar nahi rirakya gaya si 
