I am not too familiar with the subject, but is some of this hindsight bias? It's easy to point out the datapoints that could have helped once we know the result

I am not too familiar with the subject, but is some of this hindsight bias? It's easy to point out the datapoints that could have helped once we know the results, but it may be hard to go from datapoint to predicting a terrorist. (I am assuming there are many many other tidbits of data of people that these agencies have, and most of these people don't become mass murderers) Or from the statistical point of view, does inferring from this data produce too many false positives to be useful?