(Adds quotes, details) By Bushra Taskeen ISLAMABAD, Jan 11 (Reuters) - The Pakistani Islamist leader accused of masterminding the 2008 Mumbai massacre said India was trying to destabilise Pakistan and predicted violence in the disputed region of Kashmir could get "ugly". "We do not want any force to be used or any military operation for this. But the Indians are opting for the other alternative," Hafez Saeed told Reuters in a telephone interview on Friday.