Impossible.
There is no way an official execution can happen in public, in India. It is legally impossible.
The talk is just that - street talk.
That is certain what "the street" wants. I can understand grassroots Hindu anger in India. Particularl in a blatant case of Islamofascism like that (26/11). There is a long history of it. Sometimes it gets out of control, though, and goes too far in one direction in the search more for revenge than justice, such as attacking Muslim or Sikh enclaves where people live who had little to do with a certain crime or attack.
They have had this back and forth for years it seems. Like cats and dogs and jaguars (Hindu, Muslim, Sikh).