http://www.youtube.com/embed/Z09--zuktH8
http://www.youtube.com/embed/sXcI-NL3Tro
http://www.youtube.com/embed/-rbkzVkXuMY
http://www.youtube.com/embed/m0vzcSHhBS8
The rioting is not exclusive to the immigrant population- the reality on the ground is that opportunists come in all shades and national origins. Where there are no consequences, anything is possible.
If you think that this cannot happen here, you are a fool. Our crisis is just now beginning to bud- I suspect it will not be long before it flowers and bears fruit. Whether or not you live in an urban area, you should make preperations to defend yourself. If you do live in an urban area, getting out should be your primary contingency.