TEL AVIV — Israel’s Cabinet unanimously approved a proposal Sunday to designate violence against Armenians by the Ottoman Empire during World War I as a genocide.The step, which still needs approval in the Knesset, or parliament, reflects deteriorating ties between Israel and Turkey. Turkey has fiercely lobbied to prevent countries from officially recognizing the mass deaths of Armenians around 1915 as a genocide as Armenians have campaigned for such recognition around the world.Historians estimate that up to 1.5 million Armenians were killed by Ottoman Turks around the time of World War I, an event widely viewed by scholars as the first genocide...