Please read my reply carefully. I said most terrorist and not all terrorists. There are terrorists even in Hindu religion. Possibly some of those whom you have mentioned. But come to my state of TamilNadu. There are not terrorists in either Christianity, Islam or Hindu. We have only Karunanidhi, Ramadoss, Jayalalitha and the latest addition Vijayakanth. They are the real terrorists polarising the state of Tamil Nadu. So far these terrorists in TN has not affected common men. They loot money, occassionally kill.
Whereas in other states, every terrorist organization has religious backing, be it its Hindu or Islam or Christianity. They involve in mass killing. This affects common men.
And nothing takes place without the knowledge of local people. If you are honest we can weed them out easily. As i have mentioned its because of distrust. We can evolve trust between different communities, if we honestly expose the terrorists instead of hiding them in the name of religion. Again i am not trying to blame Islam. But the reality is that most(again not all) terrorists who are arrested or suspected belong to Islam. You can help the government in weeding them out.