Sure there is, if you bothered to read and research Russian history for the last 500 years you might understand.
If China were to move into Northen Mexico and controlled some of the those Mexican states what would our reaction be. Go back to the Cuba Crisis in 1962.
That Ukraine was conquered by Russia in the 1600s in no way gives them any moral, legal or rational justification to invade them in the 21st century.
The argument you are making is completely idiotic. Ukraine is no longer part of Russia. It is a recognized independent nation. Putin has no legal, moral or intellectual right to claim oversite over their Goverment's polices