The nukes were not Ukraine's. They were the USSR's, and became Russia's after the breakup. Ukraine couldn't have used them, as the codes were with the Russian military.

Ukraine added to their constitution that they would strive to become part of NATO and the EU.

Those are just two of the errors in your posts.

I'm not condoning Russia's invasion, but as @john brodix merryman Jr. points out, this is FAR from black and white.