I don't know, absent. I didn't look attheentire Twitterfeed. As I understand the death threats involved telling Nawaz that the countries where blasphemy (or whatever he was supposed to be doing wrong by NOT being offended by a cartoon) is punsihable with the death threat. This includes Pakistan where he has family and visits regularly. So they were not direct death threats but amounted to as much. The threateners, in short, were being very nasty, and knew it.
He later apologised for saying fuck off but, y'know, in the heat of the moment, it does seem like an appropriate response. Of course he wasn't thinking of being polite; he was just reacting to something horrible in a natural way, as we all would, even the saints amonst us.