Trash talk, accusing of ducking races is one thing. You can perhaps easily brush that off.
But publicly declaring that the guy who beat you doesn't deserve to be European Champion because he doesn't really belong in the place where he grew up. That's not the kind of thing where you can expect to say "Just kidding", and then move on.
... and if you do want to go and fix that up, you don't make a show of trying to do it in front of a huge audience. You do it sincerely, and apologetically, when nobody's watching.