Why don't we extend it to every criminal and every morally dubious character and every agitator? or every politician: they terrorize for political gain, don't they?
This need to extend the most damning labels to other less or differently threatening things will eventually leave us incapable of specifically describing stuff.
All while I was a kid growing up, my mother, and my close family by extension, was a potential target of ETA (separatist terrorists in northern Spain and southwestern France, operating since the 60s). She was so because of her job: state servant as nurse in high security prisons.
This makes you paranoid.
We had our car bellows lined in steel: we would check it every time we took it in case it was bomb rigged.
We would we scared to death if she came a few minutes late after work.
Minimized social interaction. Be wary of new neighbors. Distrust other parents in my school.
Modify regularly our paths through the city.
All the things any normal person does on a regular basis are questioned or avoided. And, like many people do with cancer, we wouldn't even talk about it openly.
Some of those stick with you. My mother still calls all her sisters and brothers several times a day to make them know she's ok.
Writing about it here is something I wouldn't even consider some 10 years ago.
You are dragged into a irrational spiral. One you can't quite escape: you are a target for ever.
We were not even high priority targets. Save for a few high risk months in the 90s, we didn't need constant escorts. I can't imagine what goes through the minds of people with higher risk. When they dismantled terrorist cells, there always appeared documents detailing every move of those targets. We knew a few, and you could sense their anxiety through every single word they uttered.
If you think that's comparable to the fear under street gangs, feel free to share your experience. Some gangs are actually considered terrorists, after all. But I remain skeptical about the average ones.