Did you ask yourself this question?
More than 4 Years MQM killed Pakhtoons in Karachi and ANP weaponized itself and started same killing strategy like MQM. What Happened Yesterday in Karachi?
MQM organised Jalsa for Pakhtoons in Karachi after 4.1/2 years of killing each other.
Gentlemen this was only a drama.
There are two possible reasons behind it:
Both parties are expecting a strong military operation or they have recognised that expected new Govt. after elections will go hardline against killers in Karachi.
Just see the headlines of Newspaper today:
Altaf Hussain is addressing here Pakistan ARMY:
And here you go the other Killer Party ANP: