First of all, I've heard that he did apologize not long after his messages/recordings were leaked (whichever they were). Second of all, why should he apologize now? Wake me up when other players refuse to play on the same team as him, when orgs don't want to pick him up, when sponsors refuse to support the org he's playing for. Aren't his current t2 teammates and players he plays ranked with from different ethnic backgrounds? Let me know if they're upset by what he did. Why should we be offended?
Until then, I think calling for him to apologize because people on online forums don't like what he said at 13 or 14 really isn't important. It's not going to change anyone's opinion of him that already don't like what he said. Bad example but it's like Sayf apologizing for making that shitty comment about his mom, if his own mother or teammates don't care then there's no reason to apologize to the online mob. If anything it's awkward to apologize just because.