ISIS IN HISTORY:
As the Israelites moved through the promised land killing everyone of different religions who stood in their path, they developed quite a reputation for their intolerance of others. Communities would post a sentry to warn the villagers when the Israelites were coming.
"Israelite slaves! Israelite slaves!", the boy would shout.
After awhile they just yelled, "ISIS!, ISIS!," and the villagers would run and scurry away in fear of the global attack on religion.