Thankfully, we are an armed populace, where France wasn’t. A might not be able to kill the entire mob with 00 buck, but sure can create mass causalities, which tend to discourage further action.
Remember what happened in the LA riots. The Korean store owners started shooting the looters. Guess where the mob quickly left.
Do you really think that they would allow this now? I believe there would be SWAT teams sent to take out the Korean grocers today.