'ISIS is Islam's Biggest Enemy,' Turkey's Erdogan SaysTurkish President Recep Tayyip Erdogan delivers a speech in Konya province, Turkey. Turkey's Erdogan: ‘ISIS is Islam’s Biggest Enemy’00:51Link copiedDec. 18, 2015, 8:40 AM UTC / Updated Dec. 18, 2015, 8:41 AM UTC