Most of the Ukrainian soldiers are Russian speaking. Almost anywhere in the country you can find a Russian-taught school (yes, perhaps you need to drive some extra miles). But how many schools are there in Russia that teach Ukrainian? How many schools are there in Russia that teach Georgian? Close to zero; I won't be surprised if it actually is zero. Russian drama TV shows get aired on Ukrainian television. Even most of the ministers' native tongue is Russian.
So Russians are definitely not oppressed in Ukraine. It's a myth and an ongoing propaganda churned out by Putin's machine.
Meanwhile in Russia, you have public events such as "White Wagon", that perhaps resemble a KKK-style lynching, where Russian fascists pick a non-Russian passenger and lynch him in front of the police, with no consequences. https://www.youtube.com/watch?v=Ag1K7fEjwNE Perhaps a single incident, but epitomizes the social divide in Russia, which is continuously fueled by Putin's propaganda machine. (No need to bring up Furguson. Two minuses don't make a plus.)
What about the case where ethnic minorities being denied to leave Russia to visit a UN convention? http://www.vedomosti.ru/politics/news/33685451/malym-zakryli... (sorry could not find an English article)
If you ask me, the war against Russian aggression is not only a fight against Russia, but it is also a fight against racism and discrimination. If you ask any Russian who choses to voice himself, Ukraine remains a safe haven for Russian speakers.
Russians are not being oppressed in Ukraine. Ukrainians and other ethnicities that are non-Russian are oppressed in Russia.