In your OP you asked little horn or false alarm and there have been many false alarms that have caused people to even drink kool-aid and die for they thought the end was here. Does Jim Jones ring a bell! I need not go into all the others that have caused others to take their life with what they thought they heard God speaking to them. We learn through scripture as we are taught only from the Holy Spirit as we learn to discern that of what is being taught of others is truth or error, 1John 4:1-6. I'm not saying this to discourage you in no way as I can see you have a heart for the Lord, but I have seen so many like yourself that are so enthusiastic as sending out warning, which can become scare tactics trying to bring others to Christ proclaiming Christ has sent them.Christ does send us out to preach the good news from the Gospels and prophecy is given within the Church, but not all prophecy is from God, but what man wants to speak by what they see, especially when it comes from the media.
Abu Bakr al-Baghdad is not the little horn as no leader of jihad has ever been or ever will be, but if you study Daniel 7 you will see the four horns described as being four beast (Nations) and up out of them arose a little horn which is Rome as iron represents the stronghold this nation had and will have again right before the end of days, but that is all I am going to get into here, but if you want more on this you can go to my website and click on Second Coming of Christ. Just click the link at the end of my post.