On the deface page hacker left the message stating
" This is a Wake-up call to the 'collective consciousness' of Indians. Ask yourself, do you really deserve celebrating Independence Day while suppressing freedom struggle of Kashmiris?"There is more message left by the hacker for Indians, you can directly read the message on the site as it is defaced till yet.
At the time of writing also the site is still defaced. You can check the mirror of the hack here.