My dear friends you all south indian actors once came to bollywood to make their career. They were rejected in whole India so they prefer to stay in their small south indian cinema.
Don't forget Rajni, Kamal, Cheeranjivi, Nagarjuna, everyone acted in hindi movies one or other time and their movie didn't work well. If you name company of mohanlal then you should name Aag also. Compare Sanjeev Kumar's role of Thakur with Mohanlal's in Aag. You will understand......."baap baap hota hai aur beta beta"
Its well know that south indian doesn't like hindi as a languages and your dislike of bollywood movie is just your unsuccessful effort to show south indian language and culture is superior.
