Yes. People live in countries, and sometimes people riot when they're angry.
This is a very asinine question. Riots happen in First World countries, too. Most of them are small in comparison to what's going on the Middle East right now, but they happen. It was just a couple years ago that France experienced a wave of riots after two teens got electrocuted while hiding from police, and some of the more notorious of riots occurring in the US include the Los Angeles riots following Rodney King's trial, the Watts riots of 1968.. and just take a look at some of the examples on the related link.
Hindu and Muslim riots.
Peekskill Riots happened in 1949.
Yizhou riots happened in 2002.
Rodney Riots happened in 1968.
Ådalen riots happened in 1931.
Bellingham riots happened in 1907.
Canboulay Riots happened in 1881.
Rebecca Riots happened in 1842.
Mangalmé riots happened in 1965.
Bristol riots happened in 1793.
Orange Riots happened in 1870.