I'm not saying there's no castism - there's always some sort of discrimination in every society as human beings mostly behave as selfish and unkind due to their insecurities and prejudice. But voices against are also far easier to express and be heard these days.
However, if you fuel anger and hatred in you, you're only going to get bitter and restless. which will waste your energies which you could otherwise spend in more meaningful/productive activities that uplift people you care about.
Plus not everything is black and white, no matter how much we want to see it that way. For instance, many Brahmans are also in very bad condition in India. There's a prospective that if you read with an open mind, can be useful. Found that here: https://www.ifih.org/ThePlightofBrahmins.htm
In current time the opportunities are endless. By being positive and productive, we can grow India and the world into a beautiful place, fighting, denigrating and blaming each other will only delay that.
On the small note: of course the police maintain that it was not true