British surely used Martial race theory as a means to divide people... But that indeed created a unstoppable fighting force. That's why IA still follows that concept. Tried & tested.
Indian Army really does not follow British Model in Totality. But a modified model..
Recruitment in the Armed Forces is carried out on the recruitable male population ratio of the state based on policy of Union of India. Say for example the Indian Army requires 100 recruits it will recruit 20 from UP based on their population, five from Tamilnadu, one from Nagaland. Shortfall from a state such as Gujrat is then adjusted among other states.
It is after recruitment as Macro numbers that the recruits are divided into Regimental Groups as per their vacancies. A Sikh would be sent to SIKH REGIMENT and another would be sent to ASC depending on Vacancies.
Regimentation is applicable only to half the Army for the Arms and Supporting Arms - that is Infantry, Armoured Corps, Mechanised Infantry, Artillery and Engineers. Rest 50 per cent of the Army, entire IAF and IN has no regimentation. Their soldiers are all India based.
Regimentation is more of a regional consideration rather than any martial race. ARJPUT Regiment hardly have 10 per cent Rajputs but soldiers from Ganga Jamuni including Brahmins, Gujjar, Ahirs. Garhwal Rifles has soldiers from Garhwal region irrespective of their castes, Rajputana Rifles has an equal number of Jats and Rajputs from Rajasthan.
The grouping is carried out for similarity of food habits, cultural ethos, language, region heights, weights, physical characteristics to bring in cohesion amongst soldiers of fighting units. That also facilitate administrative ease. There is nothing called martial racism there, Rajputs, Gujjars, Jats, Ahirs, Brahmins, Kayastha and Bhumihar all fight soldier to soldier in Rajput Regiment.
Those who comment on the Indian Army must know it first, know the policies and how this well-ioled machine works to save their arses rather than shoot in the air about their personal prejudices and lack of knowledge.
That man who walks there around Chusul seem to be a simple beast but things are more well organised than that.