They choose to defy public opinion and refuse to see reason. They think that their own view point or stand is the only right view point or stand, and that they have a right to convert other people to their thinking by force. For this avowed purpose they do not hesitate from committing the worst of crimes including murder of innocent citizens, looting or burning property, kidnapping people, hijacking planes and creating terror in one way or the other.
Some of the important terrorist organizations operating in different parts of the world have already been identified. The Al0Aaeda in Afghanistan, the Jaishe Mohmmad and the Lashker-e-Toiba based in Pakistan, the Palestine Liberation Organisation in the Middle East, the LTTE in Sri Lanka, the Maoists in Nepal, the Naxalite organization called People's War Group (PWA) in parts of India, the Naga National Council, several pro-Pakistan groups operating in Jammu and Kashmir, the Irish Army in the U.K., etc. are already playing havoc in their respective areas. The number of these organizations is so large that it is difficult to list them out. They have their own training systems where they catch hold of young boys and indoctrinate them in subtle ways through guile, treachery, temptations or money. At several places they are running their own schools to 'Catch them young' and wash their brains. Some of the Madarsas being run by Muslim fundamentalists are allegedly involved in this type of activities.
It would on September 11, 2001 that the world woke up to the dangers of this terrible menace. A group of Al- Qaeda terrorists, guided and supported by the Taliban leader Osama Bin Laden based in Afghanistan, struck terror in the U.S.A. in a big way. They hijacked four US planes from some US civilian airports. While one of these planes hit against the US headquarters in Pentagon, another two planed brought down the towering World Trade Centre, killing at least 5000 innocent US citizens.