The Sea of Asov is a vital port for Russian ships. It allows Russia access to the Black Sea. Without it Russia is landlocked. The Baltic Sea is also limited due to NATO. So, yes, the Ukraine is vital to Russia for its own security.
Ukraine gave Russia their nukes back after the USSR fell as part of a NATO/Russian agreement respecting their sovereignty. So, what the hell are you talking about?
Prepping for your CPAC performance on the backs of the Ukrainian people is appalling. You think we’ve forgotten about your previous support for Assad? This is an ugly pattern of yours.