I'm a civilian, a soft target. That makes me the "audience" of terrorism by definition.
If the state is also incompetent, then that just makes the terrorists look like even more of a bunch of bumbling morons.
Sure, it's easy to grab a knife or a car and start attacking people. But what does that actually achieve, beyond the immediate injuries and loss of life which are a drop in the statistical bucket? The government won't negotiate with terrorists. The general public is, I think, becoming more jaded about this kind of thing, and I also think people have become less fearful and more willing to intervene when this of shit occurs, as in the London bridge attack.
When a movement has nothing to offer anyone but destruction, violence and a miserable and lonely death surrounded by laughing adversaries, then I don't think that such a movement has anything to offer anyone who isn't one of a small minority of broken individuals willing to lash out.