ISIS TRYING TO CREATE A POSITIVE IMAGE? "ISIS frees 37 Assyrian Christians in Syria" | News24

WHY DOES ISIS CARE ABOUT RELEASING anybody? They kill indiscriminately. They kill Christians,Muslims,and anybody else they feel like killing,even sometimes their own members they distrust.
Suddenly they are starting to care? What's the deal?
"...
Damascus - The Islamic State group has released 37
Assyrian Christians from the towns of Tal Shiram and
Tal Jazira, according to a monitoring group..."

http://m.news24.com/news24/World/News/isil-frees-37-assyrian-christians-in-syria-20151108