Turkish President Recep Tayyip Erdogan urged Palestinians to unite amid Israel’s war in Gaza following hours-long talks with Hamas chief Ismail Haniyeh in Istanbul on Saturday, his office said. It was the first meeting between Erdogan and a Hamas delegation headed by Haniyeh since Israel began its military offensive in the Gaza Strip. Haniyeh’s visit to Turkey took place three days after he met Turkish Foreign Minister Hakan Fidan in Doha. Erdogan said Palestinian unity was “vital” following the talks at the Dolmabahce palace on the banks of the Bosphorus strait, which Turkish media reports sa…