Dear Salim Syed, Talking of research-about Sikh religion !! I am sure what I write further will be objected by many Sikhs, but let it be. They would object just out of 'identity ego'.
Sikhism started with Guru Nanak, who in his time started preaching against division based on Hindu-Muslim religions. His preachings talk about 'Formless God who pervades the universe'. He said - Ek Omkara i.e. HE IS THE ONLY ONE.
As happens with any guru with great followings-a chain or inheritence of Gurudom started with Nanak. Read Guru Granth Sahib or other Guru's Baani (sayings) they incessantly speak about Hindu gods and goddesses - Chandi, Lakshmi, Narayan, Brahm, Ram etc. It only happened with 10th guru Guru Govind Singh that the prevailing circumstances motivated him to motivate the fighting spirits among the non-muslim masses, as the Mughals had turned more and more vicious and tyrant. So, he named his followers -Sikh (meaning student). Thus Sikhism became a militant wing of Hindu society. If the 10th guru had lived longer he would have been followed by a living inheritor. He had even sacrificed all his sons in the fight against Mughals, he said, "Guru Manyo Granth". Which really meant that follow this Granth as you would follow your Guru, as the Holy Book had preachings or Bhajans from large number of saints or wise human beings.
But unfortunately, Most of the sikhs have implemented this advice in a ritualistic form - without actually understanding what they chant!!!!
