During his 22 years in Israeli prison, Sinwar was an avid student not only of Hebrew but also of Jewish history, including pogroms. His 2011 release brought another lesson: Sinwar, known at the time as the “Butcher of Khan Yunis” for his brutality in dispatching suspected informers,

News of the Hamas leader's death has led to an outpouring of praise and mourning, as well as celebrations at his demise