I'm avoiding this story for multitude of reasons EXCEPT this common point bugs me:
If you're going to riot and burn things, why would you do it to your own town?
It is NOT their OWN town, their OWN community. They don't actually
own it. They don't own homes, they don't own businesses, many of them have to take public transportation. They don't pay property taxes. Ferguson, MO is just a place they happen to be stuck living in, not their own community.
That's why it's not that hard to imagine why people there would be so comfortable in destroying it.
They are destroying rented homes, rented businesses, and rioting on rented streets. No liability to them.
If you want a black community that isn't prone to "destroying their own community in riots" you need to give them opportunity for their own communities first.