1. He has NOT been acquitted by the judicial system! He has not been put on trial, due to the destruction of evidence and due to the foot-dragging of state police who were his accomplices.
2. People calling him mass murderer are dead wrong. He did not commit a single murder. What he did do is called criminal conspiracy. He conspired with others in his cabinet and with members of the police to allow his party's lumpenproletarian elements to attack Muslim areas, and then ignore calls from those areas for help, and to hold down Muslims attacking Hindus in retaliation.
3. The central police, reporting direct to the Supreme Court, are investigating a series of issues related to those killings. They are watched daily by thousands, millions of Indians who want him to pay for his crimes, for abetting murder, loot and rape.
4. He will never be a PM. His own alliance partners keep him away from campaigning, because they know they will lose the votes of the secular and law abiding sections of society.