A terrorist is simply this: someone who deliberately, with malice aforethought, acts in a way that terrorizes people in another group apart from his own...with the intention of gaining something in the process or just destroying those he dislikes and disagrees with.
That being the case, governments are also terrorists when they bomb, rocket, evict, and torture people.
For terrorists to call other people terrorists while ignoring their own terrorism is hypocritical in the extreme. To bomb people IS terrorism, whether or not the bomb is strapped to your body or dropped from a high-tech airplane.
This is always plain to the people who are targeted, but not always to the perpetrator.
Every terrorist imagines himself to be fighting for freedom. Without exception. This as true of the Muslim terrorist as it is true of the Israeli or American or Chinese or Russian terrorist.
What they are fighting for is the freedom to MAKE other people agree to THEIR terms, that's what. It's freedom for them, slavery for the other guy. Every time.