Certainly, dear fellow.
The RSS strangely enough started with a branch of the Congress activism, with the organisation and activities of the Bengal terrorists, and the ideas of Savarkar who was influenced by European fascist and racist thinking of the period between the two world wars. Their founder, Hedgewar, was sent to study medicine in Calcutta by his mentor, a follower of Tilak. A quick word of context: Gokhale, Jinnah's mentor in the Congress, was a member of the Moderate faction; Tilak was an Extremist. The terms referred to the approach to advocating change to the British administration; the Moderates were not willing to go down any activism that involved violence or a direct challenge to the forces of law and order, on a point of principle. The Extremists were willing to do whatever it took to challenge the British.
So Hedgewar, through Moonje, his Congress mentor, went to Bengal, and soon got to know the principles and organisation of the Anushilan Samiti, one of the two Bengal terrorist groups. He used these methods in forming the RSS when he founded it in 1925. This was the second theme in the foundation of the RSS.
At this point, however, it was still a protest without a cause. If it was to have been Extremist Congress politics, Hedgewar might as well have joined the Congress Party. If it was to have been terrorism, he could have founded terrorist cells (he did, or rather, the RSS did, but in an entirely different context). It was neither of these. Instead, he was influenced by the writings of Savarkar, who thought that Hindus and Muslims and Christians were different nations, and could never share a political vision, because the Hindus had no loyalty except to India, Bharat Mata, and the Muslims and Christians had very obvious extra-territorial loyalties, mainly the holy cities of the middle east. Savarkar wrote that all who were loyal to Bharat Mata were the true inheritors of the land, and their composite culture, unalloyed by foreign culture (the Muslims and the Christians), was the essential culture of the land. This was the concept of Hindutva - 'Hinduness' - and it had nothing to do with religion; Savarkar himself was an atheist.
Hedgewar decided that an organisation was needed to reinstil the principles of Savarkar's line of thinking into Hindu youth - no one else qualified at that time - and he set up the RSS. Essentially, what it did was to parade in uniform, in the belief that parading in uniform would create martial valour in the hearts and minds of the paraders. It took up drilling with lathis. It had classes where the young people who joined the parades were sent through a catechism - how it would have irked Hedgewar to think that he was using a learning mechanism perfected by the Catholic Church. It had pracharaks who were responsible for setting up branches - shakhas - all over India, and the number of branches spread rapidly.
This is not the place for a detailed history of the RSS. Let me conclude by saying that the RSS did not oppose the British; that was not the point, reviving Hindu moral courage was the point. This underlying objective is the reason why the RSS and its political wing, the BJP, are always on the defensive, and always adopting victimhood. As far as Gandhi was concerned, he was hugely suspect in the eyes of the Hindu Mahasabha, the organisation run by Savarkar and his lackey, Shyama Prasad Mukherjee, for being 'soft' on Muslims. The RSS was initially neutral, but soon developed an Islamophobic streak, parading with Ganesha with beaten drums in front of mosques, and that sort of thing; it was neutral to the British, since fighting for freedom was a distraction from the holy task of re-building the Hindu as a brave and dauntless community. It was hostile to partition; far from delivering Bharat Mata from the interloping Muslim, partition was actually giving away a slice of the mother to the foreigner.
The rest you have to read up on your own.
