Mumtaz Qadri and his Janaza

I do not understand why are people bothered about janaza of Mumtaz Qadri? People who attended janaza thought that Mumtaz was a Muslim, or may be a Good Muslim. I do not find any problem if people attend a funeral because they think that the departed soul was a good Muslim. It is between them and their God, why do I judge that these people are wrong? Do I have the mandate to judge them? If I judge them, then how will I differentiate myself from those who judge me and think of me as a bad Muslim? Also, why do I need to know that Mumtaz Qadri went to Jannat or Jahannum? It is the matter to be decided by Allah; who am I to decide?

Another interesting thing is that after every few days I see posts and material against blasphemy law… I sometimes wonder why don’t I hear the same hue and cry regarding the laws about theft and murder, despite the fact that many innocents have been wrongly punished in false allegations of theft and murder.