He (Antoine Griezmann) posted not only a photo of himself in full body blackface, but then proceeded to tell everybody to calm down after they informed him of how terribly racist it was. So maybe consider he just doesn’t/didn’t care to know or learn about what he has done. Try working on not defending every single thing your “fave” does, and consider the damage of their actions. He is not above anyone else, and certainly not above POC who have to endure endless prejudice, abuse and violence daily because of their skin colour. It is not a fun costume for us (white people) to use at will. And if you still can’t figure out why blackface is racist, use Google and learn to do better and be better for POC before you start saying anything that comes close to allowing this sort of behaviour.
And sure he might remove the photo, he might use some phrase like “I’m sorry if I’ve offended people”, and whilst that is bare minimum, it’s only the beginnings of a true apology and reflection on what he did. You need to keep in mind he has to, like everyone else, learn and understand why it was wrong - which takes more actions and time than just removing the photo and a half apology because of public pressure.