You aren’t hearing that Putin is resettling ethnic groups within Russia to Crimea. The Mordvas come from the Center-East of Russia, and are Orthodox. The Buryatias are from Siberia, are close to Mongol ethnically and are mostly Orthodox with some Buddhist. They are pushing out Crimea Tatars who are Muslim from the town of Dzhankoi, which has a significant Tatar populaton. This could be a violation of article 49 of the Geneva Convention, banning the resettlement of civilians to occupied territories.
The Tatars have long been persecuted by Russia. They migrated to relatively-tolerant Crimea only to see it fall to Russian control recently. Tatars refused to vote in the disputed election for Crimea to join Russia.
You also aren’t hearing that Tatar leader Mustafa Dzhemilev reported December 6 to the EU that six nuclear warheads have been moved into the peninsula by Putin.