Sorry, but I think you have this backwards.
In 1991, the US wanted Gorbachev to release East Germany, and to take Russian nukes out of the Ukraine.
Russia did that, but got Sec of State Baker to promise "no eastern expansion of NATO".
And Baker lied.
We added over a dozen eastern expansion of NATO countries into old Warsaw Pact countries, in total violation of our promises and treaties, such as the Budapest Memorandum.
Putin deserves all of the Ukraine.
The Ukraine is historically not just part of Russia, but Kyiv used to be the capital of Russia.