Millions of illegal immigrants are living in Russia, they work low wage jobs and are exploited by their employers.
55% of Moscow's residents believe that the number of migrants is a major problem, with many of them worrying that Central Asia's Muslims will spread religious extremism.
Many Russians are very patriotic and worry that immigrants don't understand what it means to be Russian, let alone speak the language.
Russia's migration policy doesn't allow many workers in, which creates lots of room for bribery.
In addition, the Russian government does not support much economic development in the poor former Soviet republics (Tajikistan, Uzbekistan, etc.).