You may be right. His name sounds Russian or Slavic. Even then, another country's law shouldn't trump your own country's law. If he is on a blacklist of some country, ban him only there.
But Apple is an American company? If he's sanctioned for being a Putin affiliate or whatever, Apple has to abide those sanctions, even if he's not sanctioned in whatever country he lives in.
Unless you have specific incriminating evidence, please don't present this hypothetical nonsense as if it's a real possibility. Here's more information about the author: https://blog.kulman.sk/about/
What a shame that comments keep mentioning Russia just because the author's name is not "John Smith" or something.