Question

why was hindu - Muslim unity required to attain freedom in india?

Answer 1

We all know that "unity is strength ".During the years of 1947,there the only thing that came to people mind that how to attain freedom, and we know that the enemy inside home is far more dangerous than outside, soo to face against the British it was very much necessary that both Hindus and muslims come together to face the common enemy because here it was not War of people against people, it was not war of religion against religion, here it was the question of the nation. That nation which had served both Muslim's and Hindus in the equal way..........

Answer 2

There upon on the Hindus and Muslims formed separate organizations and Bengal was reunited in 1911.
The next important milestone in the history of the struggle for freedom was the establishment of the All-India Muslim League during the early years of the 20th century. It argued for a separate Muslim-majority nation. Finally, in 1947, British India was partitioned.
INC was divided into two groups mainly by extremists and moderates. The “three Ps” minor became the slogan for the moderates. In a meeting held at Nagpur, while the extremists wanted Lala Lajpat Rai or Balgangadhar Tilak as the President, the moderates wanted Dr. Ghosh to be President. Gokhale changed the meeting place from Nagpur to Surat fearing that otherwise Tilak would get elected.
The Lucknow Pact was an agreement between INC and the Muslim League (ML). Muhammad Ali Jinnah, then a member of INC, as well as leader of ML. The pact resulted in pressure being brought upon the British government for adopting a liberal approach, giving Indians more authority and for safeguarding the Muslim demands. The Nightingale of India, Sarojini Naidu, gave him the title of “the Ambassador of Hindu-Muslim Unity”. 
The Lucknow Pact also was another agreement which brought about cordial relations between the two prominent groups of the Indian National Congress – the "hot faction" or “garam dal” led by Bal Gangadhar Tilak, and the moderates or the "soft faction", or the “naram dal” led by Gopal Krishna Gokhale.
“Father of the Nation” Mahatma Gandhi, was easily the most important of the leading of the movement. He led from front the pacifist role of the movement and won the admiration and respect of the western world, especially countries which were under the clutches of the imperialism. Gandhi had earlier spearheaded movements demanding civil rights in many countries, especially the USA and South Africa. He and Leo Tolstoy wrote to each other regularly – a correspondence which led to the non-violence movement for Indian independence.In Champaran village, farmers were forced to grow cash crops and pay heavy taxes, even in the face of a severe famine. Under Gandhi’s leadership the farmers made a non-violent protest for their rights, which were consequently restored. He also played a key role in securing Muslim support for INC – by upholding the right of Islamic Caliphs in Turkey. 
Following the Jallianwala Bagh massacre, and other similar events, Gandhi led a series of protests. His determination grew resulting in the mobilisation of a large following. He then called for a nation-wide non-cooperation movement and for the boycott of all British goods and services. 
Following the world-wide “Great Depression,” in 1930, the British government hiked up taxes in India. The British people were able to withstand the impact as Indians paid unfair taxes on items like salt. There followed what is known as the “Salt March” or “the Dandi Satyagraha”. The march extended from Sabarmati to Dandi. Gandhi cooked salt and was arrested, igniting the passions of Indians and leading to a nation-wide agitation. 
Three rounds of what were called “Round Table Conferences” then ensued in which the demand for self-rule was placed.
In the Second World War which broke out in 1939, the British government unilaterally included the Indian Army, enraging the nationalists. Gandhi and the whole of India opposed the move, pointing out that it was hypocritical and wrong for the Indian Army to join a fight in favour of a democratic struggle when such freedom was unavailable citizens of India.
What is popularly known as the “Quit India” movement followed, marked by massive boycotts and civil disobedience. Citizens for arrested in the protests which seriously disrupted British trade, especially around the Indian Ocean.
These developments culminated in the call for independence and, finally, led to the grant of independence in 1947.