The Sufi and Bhakti tradition in Pakistan and India are two such trends from within Islam and Hinduism respectively, that are focused more on the unity of humanity as a whole, overcoming sectarian divides.
The saints from these traditions had massive appeal among people of different religions and they were away from the centers of power, unlike the clergy. We have seen rich traditions of people like Kabir, Tukaram, Narsi Mehta, Shankar Dev, Lal Dedh, clearly from within the Hindu tradition, while Nizamuddin Auliya, Moinuddin Chishti, Tajuddin Baba Auliya Ajan Pir, Nooruddin Noorani (also known as Nund Rishi) coming from a clear Sufi tradition and Satya Pir, Ramdev Baba Pir, having a mixed lineage, where Bhakti and Sufi themselves are deeply intertwined.
Sant Guru Nanak did try a conscious mixing of the two major religions of India. He traveled up to Makkah to learn the wisdom of Islam and went to Kashi to unravel the spiritual moral aspects of Hinduism. His first follower was Mardan; and Miyan Mir was the one who was respectfully invited to lay the foundations of the Golden Temple of the holy Sikh Shrine. Guru Granth Sahib has an inclusive approach to religious wisdom. No wonder people referred to him as, ‘Baba Nanak Sant Fakir, Hindu ka Guru Musalman ka Pir’ (Saint Nanak is a saint for Hindus and a pir for Muslims).
Read more: Communal Harmony