You can see from what the Communist Party is trying to do in Turkey, the ineffectiveness, and indeed, the counter-productivity, of the strategy of sporadic violent attacks as a method for inciting widespread social revolution.
These tactics alienate the population, they do not win their support or prompt them to rise up against the state.
Very often, violence is undertaken by groups that have failed to communicate with the public, and have been unable to grow their support network among the population.
They become radicalized by their own incompetence at grassroots outreach and the rigidity of their perspectives. They hold views that exile them to the fringes of the community, and instead of reassessing their positions; they become even more extreme, and begin to believe that dramatic acts of violence will somehow break through the malaise of the general public.
It is extremely dangerous when any group starts to isolate itself and become self-reinforcing, without interaction with those outside the group. They will eventually lose connection with the reality of the society they are trying to change, and ultimately, this will lead them to strategies of change that only decrease their impact, and often, to strategies that actually cause harm to the very goals they are pursuing.