This question has been answered well in couple of movies that I saw recently. The first one was Bheema. Everybody in the plot is killed. The film’s songs were good, but the screenplay was a huge let down. The film could have been made better.
The other on similar lines was Pattiyal. Starring Arya , Bharath , Pooja & Padmapriya. Bharath could not carry his role to perfection. His inexperience shows. Arya has done a good job. The screenplay is decently done. The director gives us the message that any body who takes the path of violence will only lose.
The path of violence is very emotional & people can easily fall into that trap. Later they realize it is not easy to come out. Some of the warring organizations are one such real life example.
Gandhiji’s non violence proves the point !