Simply because they did not follow Allah

The men were marched along a beach before being forced to kneel and beheaded simultaneously
Read more:
http://www.dailymail.co.uk/news/arti...#ixzz3RvDIwq00
[
Egyptian warplanes struck
at least Islamic State targets
near the Islamist-held city of
Derna in eastern Libya today
Strikes come after ISIS-affiliated
militants beheaded 21
Egyptians Coptic Christians
in a sickening filmed massacre]
America is now considering to put Boots on the ground
they need to hurry up.