Milton Friedman
I would bet that if they tried, they might be considered terrorists too. It reminds me of this old Thomas Jefferson quote:
"The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants."
In the case of the Islamic terrorism, their goal is to spread the authority of Islam.
So, for example, since the Charlie Hebdo attack, nobody will publish any image of Mohammed. We are now all following that part of Islamic blasphemy law, because we're afraid of their enforcement squads. So in that spot they succeeded.
The name of the game is putting the whole population into a juice-press. Always was, always will be.
It works like this. You are a rich fucker who wants to mug a country. To do that you need an army. So first you locate some traumatized people. Feed them money and motivational ideology. Point them at your target. Profit.
Voila, you have invented a band of terrorists.