Tell John Kennedy in October 1962 that he was depriving Cuba of its sovereignty.
Cuba was a direct threat to the United States and JFK responded.
Ukraine, after the 2014 United States Coup became a direct threat to Russia and Putin did like the US did.
The difference is that in 1962 JFK faced a rational Soviet leader in Khrushchev.
In 2021 Putin faced the Lunatic Joe Biden.
Your position will lead to you and yours dying in a nuclear war for Ukraine.