Yes, I think that would make a major impact on the presenting symptom. However, the church’s role is to address the personal immorality which has created the culture in which the “youths” exist.
I think they were causing trouble at the church picnic before they attacked the strip mall.
What they really need to do is grab the cellphones of these creeps and see if they can trace the call back to whoever put out the call for the flash mob. Then hit his house, shoot his dog, terrify his family, and beat hell out of him. Finally, toss his agonized carcass in a jail cell.