Ukraine is part of Russia. Look at the history: after all, the territory, the people – it’s all from Russia.
An old Kremlin’s myth debunked many times.
Ukraine is recognised in international law as a sovereign nation state, with its own flag, nationality, language etc. Ukrainian citizens are citizens of Ukraine, not Russia. Russia has no right to claim them or to legislate for them.
The first historical state with a Slavic settlement was formed around Kyiv more than two centuries before the foundation of Moscow. Throughout the centuries, Ukrainians maintained their own cultural and linguistic identity. The distinction is apparent e.g. through the fact that in 1654, Ukraine and Russia needed translators to sign the Treaty of Pereyaslav.
In the last Ukrainian census, carried out in 2001, 8.3 million people (17.3% of the population) identified as ethnic Russians http://bit.ly/1gKrIph.