How to find films that contain a specific motif? [closed]

I suspect that the question I have is off topic for this site. I'm looking for movies about terrorist acts told from the terrorists' viewpoint. It does not matter whether the films are about "good" terrorism (i.e. revolutionaries trying to force an oppressive government to do good things) or "bad" terrorism (i.e. terrorists fighting against commonly held values and ideals), as that distinction will depend on who's side one is on and is not one relevant to the narrative structure I'm after.

As the question itself will most likely be off topic, I'd like to ask how I can find such movies and what methods and strategies I can employ to find them.

There is no list of such movies (that I could find) similar to Wikipedia lists of genre movies (e.g. List of thriller films) and a Google search for "films from terrorist viewpoint" only turned up a handful of examples in a Reddit list. Maybe it is not a viewpoint that many movies take on, but maybe I'm just searching the wrong way.

So, more generally maybe, how does someone go about finding movies with a specific motif?

(I'm not sure about the proper tags for this question, so please edit, if you know.)