The article implies strongly that Facebook prefers to focus on the short term task of blocking offensive content and only pays lip service to the long term task of pursuing criminal charges.

I'd definitely believe that that is the case, as there's little economic incentive to play the long term game with its uncertain payout if you can just churn through low-wage content moderators instead.

Users of Facebook, but more realistically, employees of Facebook are the ones best situated to pressure Facebook to change that behavior.