Why guru gobind Singh supported brahmins and not fought for sudras? They only fought against Muslims. After I read this How I can say that sikh fought for oppressed? sikhism fought for Hindus and fought against Muslim. Now I understand Today why Hindu and brahmins love guru gobind Singh they also claime that gurus also worshiped Hindu gods. Guru gobind Singh was bhakt of kali and shiva. Guru granth sahib preaches the braveness of Hindu gods. My friend is khatriya sikh and also proud of that. Other sikh Dalit sikh. Lower caste sikh is not allowed in jatt guru duwara. It not mean that gurus was politician they just do politics with brahmins to destroy the Mughal empire in the name of religion and Sikhism is a courropted and hypocrity religion in the name of saviour of oppressed people? Sikhism supported brahmins oppressor and i readed history and did not found that the gurus fought for sudra and dalits. They just fought against Muslim and Mughal rule. Aurangzeb tried to make rules against brahmins who oppressed women's and did sati pratha. Who is right Aurangzeb or guru gobind Singh?

Your questions imply that you have collected lot of misinformation from various organization who wants to defame Guru Gobind Singh Sahib and create confusion among the public.
Guru Gobind Singh Sahib neither fought against any sect and nor supported any sect. He has fought against the injustice. Guru Gobind Singh Sahib did not fight against any Sudras and nor supported any Brahimns. In fact his most of the fights were with the king of hills, who were mostly Brahimns.
All the low caste people were with Guru Gobind Singh Sahib and they mostly fought against the king of hills, who were mostly Brahimns. He did not attack any Muslim also. The king of Hills induced the Muslim rulers to fight against Guru Gobind Singh Sahib. Many Muslims supported Guru Gobind Singh Sahib.
Pir Budhu Shah is one of them.
None of the Guru Sahibs, including Guru Gobind Singh Sahib, worshipped any human being or any of the Hindhu God. This all fake propaganda have been created by the English people and Brahimns. All Guru Sahib propagated the Shabad Guru.
Guru Gobind Singh Sahib ordered the Sikhs to follow Guru Granth Sahib.
Guru Gobind Singh Sahib has not started any new religion. He has completed the process started by Guru Nanak Sahib and ordered all the Sikhs to research and follow Guru Granth Sahib.
Since the physical power was also to be transferred to Guru Granth Sahib for ever. Hence, the tradition of adopting Sikhi was started in the form of Khande Ke Pahul.
Earlier was also it was Shabad Guru and now also it is Shabad Guru only.
ਸਬਦੁ ਗੁਰੂ ਸੁਰਤਿ ਧੁਨਿ ਚੇਲਾ ॥- 943
Though the idiom of 84 have been used. But it has also been specifically clarified that there are unlimited types of living beings.
ਕੇਤੀਆ ਖਾਣੀ ਕੇਤੀਆ ਬਾਣੀ ਕੇਤੇ ਪਾਤ ਨਰਿੰਦ ॥ ਕੇਤੀਆ ਸੁਰਤੀ ਸੇਵਕ ਕੇਤੇ ਨਾਨਕ ਅੰਤੁ ਨ ਅੰਤੁ ॥੩੫॥ Jap – 7
The various categories of Gurdwaras have been created by the politicians for their selfish interest and ego and to defame the Gurus. Anyone of any caste and creed can come to Gurdwara Sahib. If you want to get correct information then start studying Guru Granth Sahib and stop learning from the various WhatApp Universities.

ਗੁਰਮਤਿ ਦੀ ਖੋਜ ਸਬੰਧੀ ਹੋਰ ਵਿਸ਼ਿਆਂ ਤੇ ਜਾਣਕਾਰੀ ਹਾਸਲ ਕਰਨ ਲਈ ਕਿਰਪਾ ਕਰਕੇ ਇਸ ਲਿੰਕ ਤੇ ਕਲਿਕ ਕਰੋ ਜੀ
Please visit this website to get more information about research on Gurbani.
https://gurmat-research.com/