Well... The USA didn’t INVADE Cuba... right ?
Russia has invaded a sovereign nation which borders are internationnaly recognized TODAY. I don’t care happened in history when Jesus Christ was alive,
What counts is international rules of TODAY. They are clear and written in stone.
Since you rely on so called “history” so much... :
According to you, the native Americans in The USA would be in their full right to abolish it and make it native American again ? Right ?
Google "Bay of Pigs"
Their problem was unrestricted immigration, and lack of border control. Sound familiar?