Obsessive and dictatorial, Yahya Sinwar was feared on both sides of the Hamas-Israel war
Back in Gaza, Sinwar closely coordinated between Hamas' political leadership and its military wing, the Qassam Brigades. He also cultivated a reputation for ruthlessness. He is widely believed to be behind the unprecedented 2016 killing of another top Hamas commander, Mahmoud Ishtewi, in an internal power struggle.