He became the British citizen now but was a Pakistani before and also, has been handling the most brutal party of Pakistan MQM. His speeches are good enough to understand as well as to evaluate hence, state was not fool to lodge FIRs against him. There was a reason that he ran from Pakistan that not even going in detail, he is the one that actually put another ethnic based hatred seed in Pakistan by way of chanting slogan of linguistic and ethnic basis. He was on asylum that got the citizenship but still, is responsible for many crimes if not then PMLn should not ban many other Pakistanis Persons on the wish of other people but the same is not solution at all hence, warrants strong diplomacy and foreign offensive strategy the same way other did to us. He is a Pakistani traitor at first and became a British Citizen then after.
I am not naming anyone here that got hit of the same foreign diplomatic policy but there is a lacuna in the case due to incompetence of the officials that couldn't provide all those evidences that may involve many of our cream politicians and who knows people from bureaucracy as well that have been supporting this cancer. There are thousand reasons to cover the incompetence yet there is only one shot needed to deal with such culprits. The logic of citizen or not and so-called technicalities are only good to turn a blind eye from the real matter if one don't want to deal. The guy is responsible for many of things and suffering of people especially in Karachi & Hyderabad hence, he deserve the same suffering.
To go by the same logic, let other non-Pakistani terrorists live the way they do and do not demand anyone. You are merely looking at the bit of an issue which is too low for the level of such matter. Citizenship etc are only technical things but the merit says otherwise though, leaving it the way that he is not a Pakistani, is not a wise thing to say at all.