There's a hot topic in my country: One person who murdered his boss for the sake of blasphemy has been hanged after 6 years. From the BBC:
Thousands of Pakistanis have turned out for the funeral of a former bodyguard executed for killing Punjab's governor over his opposition to blasphemy laws.
Qadri was hailed as a hero by Islamists for the 2011 killing of Salman Taseer, who wanted to reform the strict laws.
I was put forward a story which I don't know the origin of: It says that one Muslim and one Jew went to Prophet Muhammad (PBUH), with some issue and Prophet Muhammad (PBUH), made the decision in favor of the Jew, which made the Muslim angry and he went for second opinion to Hazrat Ali. Upon hearing that Prophet Muhammad (PBUH) had made a decision and the Muslim was not ok with it, Hazrat Ali beheaded the Muslim, saying he was a hypocrite.
If that is true, then does this mean that when someone blasphemes, a person who witnesses it can kill him because he made blasphemous remark, and is a hero or martyr if he is executed for murder?
I am confused over this subject, as a murderer was deemed a hero at his funeral in the above example.