At the end of the cold war, Ukraine gave up its nukes based on Russia’s promise to respect Ukraine’s territorial integrity. Why would Ukraine trust any deal with Russia? WRT Russia, NATO is purely a defensive alliance. Russia justified Ukraine’s desire to join NATO by doing what Ukraine feared most - an invasion of Ukraine by Russia.
Stop posting this nonsense. Ukraine did no such thing. The U.S., UK and France would never have let Ukraine keep any nuclear arms under any circumstances. The Ukrainian independence movement would have ended immediately in 1991 if they didn’t cave to the NATO nuclear powers over that.
“NATO is purely a defensive alliance.”
Not for many years now.
It is quite the opposite of what you are posting...