Those belonging to ISIS have sworn by Allah to rid the world of other religious groups, even at the price of their own lives, and to restore the glory of Islam as they understand it. They use rape, beheadings, shootings, crucifixions and sexual slavery as weapons against their enemies. They are prepared to fight for several generations to see their aims fulfilled.
British Prime Minister David Cameron, who says Britain is in the top tier of ISIS's overseas targets, is seeking approval in Parliament for British air strikes in Syria as well as in Iraq.
Decisions are not only in the hands of politicians. If you are a Christian, there is something you can do. If we are Christians, there is something we must do. Pray. Prayer can make a difference.
Click here for an article on how to pray for ISIS, and here for a first-rate 30-day prayer programme.