Mass murder Russians? You mean foreign invaders? Or maybe these are Russian forces murdering Ukrainians because they can use chaos to pretend that a secessionist vote passed there too?
Kievan Rus is the heart of Russia.
Western Ukraine is Polish land, and it was until 1939.
Calling Ukrainian citizens of other ethnic extraction "invaders" is shameful. It borders on Nazism.
Check the history books. It ain't pretty.