It's despicable and I fail to understand how educated and technical people can still practice something so inhuman.
To the people saying nothing has changed in India, no, so so much has changed, there are many more intercaste marriages and anecdotal but like 50% of marriage news I hear are all intercaste. Casteism is on a decline as far as I can tell. The young generation seems to care about these things.
Also people saying Indian parents don't allow to marry anyone with a lower caste are being selective. Indian parents don't allow to marry anyone outside their "own" caste whether they are higher or lower, practised by both "lower" and "upper" caste parents.