STORY HIGHLIGHTS      
    Amman, Jordan (CNN) -- They arrived at the    church with only what they could carry: clothes, pictures and a    few family heirlooms.  
    It's all that is left of a life before the Islamic State terror    group swept into northern Iraq, giving the Christians of    Qaraqosh and Mosul an ultimatum: Convert, leave or die.  
    Most, like Ammar Zaki and his family, fled first to the    relative safety of Iraq's Kurdish capital of Irbil and then    made their way to Amman, Jordan, where they found sanctuary in    a church.  
    Roughly 100 Iraqi Christians are being sheltered at St. Mary's    Church in the Marka neighborhood of Amman. Their sanctuary    offers little more than floor mats and a roof, but it's a    welcome haven after fleeing ISIS persecution.  
    "Jesus Christ told people, 'leave everything and follow me,' "    Zaki said, cradling his 9-month-old daughter, Athena. "So we    did."  
    The stress and strain of the journey show in Zaki's tired eyes.  
    "We had to leave everything and go ... to be Christian, to stay    in my religion," he said.  
    Safe haven  
    Jordan's capital of Amman has become a magnet for many refugees    in recent years trying to escape war or persecution. More than    1 million Syrians fleeing a civil war have poured into the tiny    desert kingdom, and hundreds of thousands of Iraqis -- many of    them Christian -- have sought haven from the sectarian fighting    and later ISIS.  
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Iraq's Christians find refuge in Jordan