There is possibly nothing more alienating than violence. Even if you are advocating perfectly justifiable grievances, even if you are promoting the most virtuous of ideas; if you pursue your goals through violence, even the people you intend to help will distance themselves from you. Taking up arms in any sort of struggle can only ever be validated by the general consensus of the people. And this is appropriate, because the whole population will suffer the consequences of armed resistance.
However, what we generally see in the Islamic movement are small groups who have failed to mobilize popular support, and therefore adopt violent tactics in an attempt to augment their power, which they have been unable to consolidate through grassroots persuasion. This will always fail.
There are no shortcuts to progress. If you want to defend the people, protect them, improve their lives, redress their grievances, and promote their best interests; you cannot do this by simultaneously ignoring their legitimate concerns, their worries, their hesitation, and their distaste for violence. And you certainly can’t do that by being indifferent to the destructive consequences you will bring down upon their heads when you decide to adopt tactics of violence and terrorism.
That is not advocacy, it is betrayal. You may imagine that you are the heroes of liberation, but you are the vanguard of catastrophe.