There are certain people for whom the apology does help. Nick Canon actually took the effort to go learn why what he said was a problem. He apologized but then put in the work. That's just not going to happen with Kyrie or Kanye. So we demand an apology, and then what happens? If they get canceled, deservedly, that proves the conspiracy theories correct, as we see with Kanye. And if we ignore him, then he's allowed to keep spreading hate to people who actually listen to him.
The age-old antisemitism catch 22