I know it seems like a long shot, but could they potentially be trying to do good and help people?
The US doesn't have a good track record in that regard, even towards its own people.
You are really saying the fbi does more bad than good?
Some department head got patted on the back, and a bunch of "analysts" burned 10 times what it should have taken to put this together. They're all getting salaries, good retirement benefits, and the satisfying feeling of having ended child exploitation (or at least telling people that).
To prevent child crimes? That's a big mission of the FBI.