Try it and Kiev is Russian in 2 months.
... and then WW III breaks out and it's game over for everyone.
GG.
Did the WW3 broke out after Russia had a war with Georgia in 2008? No. Did any of the NATO boyfriends came to the rescue of Georgia? No. The same will happen now. None of the NATO nations want to have a direct confrontation with Russia. They are not stupid enough to sacrifice their soldier's lives to defend a third world nation such as Ukraine.