I have an extensive retail wine sales background in the United States. Indian customers (ones who have emigrated to the US or are visiting, as opposed to those who were born here and are ethnically Indian) tend to be in a higher income bracket than most liquor store customers (many are professionals: doctors, lawyers, engineers). Their tastes vary as much as anyone's, but as a general rule are the customers looking for nicer wines in the high teens and low twenty dollar range as opposed to the $8.99 or lower value shoppers. Very few of my Indian customers buy wines under $6 (in fact I can't think of any of them).
I cannot speak to Indians in India, although the trade press says India's growing affluence is leading to rapidly growing wine sales (though India still accounts for a very small portion of the international wine market).
I am not aware of a particularly strong aversion to alcohol in Indian culture (no more so than in the US, where 50% do not drink any alcohol according to Market Watch). Due to extremely high taxes on imported spirits, luxury Scotch and bourbon is extremely expensive in India. Many of my customers visiting from India buy high-end brown liquors to take home.