Being if dravidian descent, like most of south India, they definitely identify as Hindu and have the same range of fervor from barely religious up to religious nationalist as the rest of India.
Hinduism amalgamated a lot of local religions and philosophies as well, so proto Hindu beliefs and traditions are also part of modern Hinduism.
Funny enough, hindus are not indigenus to india. they came here during aryan migrations, the real indigenus people are dravidians.
I don’t think indigenous has particular meaning after four thousand years.
Being if dravidian descent, like most of south India, they definitely identify as Hindu and have the same range of fervor from barely religious up to religious nationalist as the rest of India.
Hinduism amalgamated a lot of local religions and philosophies as well, so proto Hindu beliefs and traditions are also part of modern Hinduism.