They are an organized terrorist group formed in 2004 originally called Al Qaeda, and shared views with Osama Bin Laden. Both ISIS and Osama's Al Qaeda were anti-western militant groups.
ISIS controls a lot of land, including oil mines that give the group control over this powerful asset. Abu Bakr al-Baghdadi is the leader of ISIS.
Sandy: I don't like the fact that they attacked Paris, but I don't really know much about them other than what has been said in the news.
Craig: They capture people against their will, they destroy places of history and culture. They have no respect, and only hurt other people to get what they want. We strongly disagree with their motives and their tactics.