[shireeshj]

Let me try to explain the concerns using couple of points:

(1) Google (if it wants to), can influence the opinion of the entire country, by promoting content it wants people to see. That essentially could mean, a government coming to power that Google likes, not the people of India.

(2) With India lacking any data privacy law, this data will flow to google's data centers outside India. In a (future) war like situations, this data could become an important weapon.