Somebody tell me why we're there?

Some sobering reading from The Report on Progress Toward Security and Stability in Afghanistan:

The overall assessment indicates that the population sympathizes with or supports the Afghan Government in 24% (29 of 121) of all Key Terrain and Area of Interest districts. 

Finally, in order for the ANSF to successfully transition to security lead, there is a requirement for a minimum acceptable rule of law capacity (i.e., governance, courts, judges, prosecutors, and correctional capacity) to support the security effort.  Defining sufficient rule of law capability, and the resources required to achieve it, is outside the scope of this report but is being addressed by the interagency and international community.  Without the necessary supporting rule of law structures, the ANP will become ineffective over time.  No matter how many police we train or how well we partner with them, without sufficient rule of law and governance, transition will fail.

Can we discard this folly and actually bring justice to those who attacked us?