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MOSCOW — Thousands of far-right nationalists and neo-Nazis marched through Moscow on Friday to call for ethnic Russians to “take back” Russia, as resentment grows over dark-complexioned Muslim migrants from Russia’s Caucasus and the money the Kremlin sends to those restive regions.

Chanting “Russia for Russians” and “Migrants today, occupiers tomorrow,” about 5,000 people, mostly young men, marched through a working-class neighborhood on the outskirts of the capital. Police stood shoulder-to-shoulder along the street, which was blocked to traffic.

Violently xenophobic groups have flourished in Russia over the past two decades. They kill and beat non-Slavs and anti-racism activists, and crudely denounce the influx of immigrants from the Caucasus and from Central Asian countries that were once part of the Soviet Union.

They have drawn moral support from nationalism that has been encouraged by Vladimir Putin’s rule as part of the Kremlin’s attempts to rebuild a strong Russian state.