That´s great because Russia will need to assimilate millions of immigrants, and that means to make them Russians; first Russian speakers, then part of the Russian melting pot which has a long history. The Russian nation has assimilated already dozens of minorities, tribes and millions of immigrants from the rest of the World. There are millions of Russians with great grand parents from different backgrounds.. Pushkin had an Ethipian grand father (who was a high-official of the Czar´s Court while in America he would have been considered half-human by the Founding Fathers), Katherine the Great was German-born, Lenin had a Kalmyk grand father....So the melting pot in Russia is very deep and broadly successful assimilating minorities from dozens of ethnic groups. The Russian language and the Orthodox Church played an important role, but thousands of Protestants, Catholics, Atheists, Jews and Muslims participated also in the melting pot so millions of Russians, perhaps the majority, have relatives who belong to a different ethnic and religious background. That is something the present Presidential envoy to the North Caucasus federal district, Khloponin, news very well. Civil War and ethnic Nationalism in the Caucasus has led to endogamy so the next step should be integration, knowledge, tourism, intermarriage...as ethnic nationalism is just a form of racism.