Seeing last events, i think there are two kinds of terrorism.
These terrorists (Islam fighters) are 'international' terrorists, and it is a form of terrorism very new to us. They don't act inside their own nations (so it is not easy to control them) like it happens in Palestine or in Ulster or in Spain and they use civil transports and human lives as weapons with an atrocity never seen before, besides they are silent and mute terrorists while (until now) terroristic attacks have always been signed.
It is a terrorism we didn't know until a week ago and we couldn't imagine either, someone said it is the terrorism of the new millenium but it has bases on the old one, both should be fought.