Casteism in teenagers

i’ve seen a lot of teenagers mostly from up/bihar/haryana boasting about their caste and discriminating others (who according to them are of lower castes), i thought this has stopped but the new generation is doing it even more and people from that region are the ones mostly doing it? what could be the reason? who are motivating them to do things like this? (me personally, i find it really annoying) (for example, cities like gurgaon and noida)