All true religion finally leads to pure spirituality where there is nothing but Oneness like pure space. Can you divide space? No, because division is mental. Spiritual reality is beyond Time-Space continuum. However, due to ignorance of true spiritual reality, Nepalese people are engaging themselves in cat fights based on caste system of Nepalese society which itself is not in harmony with Vedic Scriptures. Most people who claim themselves to be a Hindu don't even have true knowledge of Vedanta. How many Nepalese people adhere to the Upanishadic words? It clearly declares these four sentences and there is no need to cat-fight on castes which doesn't exist in reality.
1) Tat Tvam Asi : That I am. What is That? That is beyond mind, therefore indescribable.
2) I am Brahma: When Atma infinitely expands then it is called Brahma. Atma envelopes the entire Brahmanda. In Vedic Sanatan Dharma, every single entity is one undivided Brahma.
3) Pragyanam Brahma: Pragya means consciousness in Sanskrit. And this awareness itself is the true Spiritual reality which is Brahma. Existence itself becomes aware of itself. Therefore, Consciousness is Brahma.
4) Ayam Atma Brahma: Atma is the word for the true Self within. This Self is not your ego bound self but is transcendental awareness which is a witness consciousness. This is you. You are this, not the limited ego bound consciousness which thinks I am male or female, Bahun or Chettri etc. etc. Atma is sexless and also caste-less. Your true identity is Atma.

There is no place for caste in Vedic Sanatan Dharma. Varna system has been wrongly manipulated as caste system by birth. Varna System infact came from the 3 qualities of human mind: Rajas, Tamas, and Sattva. Rajasic people are always involved in activites, Tamasic people rest a lot and are slow in understanding things, and Sattvic people are those who are serene, calm and intelligent. In true Yogic culture, all these mental modification do have colors as well. Rajas has red, Tamas has black and Sattva has white. And every single individual has all three present in some degree all the time. The variations of these qualities makes your personality and you behave accordingly. And a Varna System (system based on Rajas, Tamas and Sattva) came into being to categorize people based on their mental modifications. And these mental modifications changes through-out life based on your Karmic predisposition. There is no place for Caste-System based on birth on Vedic Sanatan Dharma.
Therefore, Nepalese people need to understand these 4 Maha-Vakyas and practice true Vedic Sanatan Dharma (Nepalese context who think they are Hindu).