There is also a general belief that
1. Sikhs & Gurkhas are warrior class, they are overrepresented in the military.
2. Parsi's are extraordinarily successful businessmen, they are among the wealthiest Indians.
3. Brahmins are extraordinarily successful academically.
4. Jains are successful businessmen.
Let us remember that 1-3 were co-opted by the British as loyal troops, given special concessions in business, and employed as loyal servants in clerical tasks.
In the case of [4] it is survival bias, being a true Jain is very hard and only the rich elite could adhere to it.
Some communities in India have had a head start or rather the barbaric colonial rule had pulled down much of the population to abject poverty and gave few people not in abject poverty a head start.
Equally there is a special hate campaign against Brahmins emanating from church as they are seen as guardians of high culture and scriptures.
As a vast majority of Indians have not converted to Islam or Christianity in spite of the hostile foreign occupation anywhere between 400 to a 1000 years, I can safely say we are all warriors and the last surviving major ancient civilisation.
The caste-debate is a two way street and is mostly kept alive by few vested interests. Among the youth it is mostly the "reservation" that exposes them to "Caste politics", as online education & private sector picks up it is going to be less relevant.
To be fair to Brahmins, as non-brahmin with a brahmin-like first name from Tamil Nadu I have been at the receiving end of the political-church driven hate campaigns that even teachers take part in.
I think we should not tolerate any kind of hate especially hate campaigns, esp. for the younger generation.