In the following Video, Gary Yourofsky exposes the cruelty of the animal and dairy industry. He establishes the fact that humans are not meant to eat meat. He also preaches strongly against consuming dairy products, based on the reality that 100% of milk giving cows are slaughtered. In order to give milk, cows are artificially inseminated year after year. Once the calf is born it is immediately separated from mother cow after birth, and slaughtered shortly afterwards.
In India there is still a strong culture of cow protection, although that is also rapidly changing. So (in regards to consuming dairy products) his views do not apply for a cow protecting society.