Yep. Not dissimilar to the Vinicius incident at Benfica. Now, before I get jumped on from a great height, let me make perfectly clear that nothing excuses the racism that he seems to have been subjected to from Prestianni that evening. Repeat for the hard of hearing; NOTHING. From memory, after he scored, didn't he go over and dance at a corner flag in front of the home fans. Sometimes you just have to use your brain in such a situation, whatever the provocation. Go and celebrate with your team mates and with your fans, if the geography of the stadium allows. Doing what he did, or what the Celtic player did today, is not clever. Effectively goading opposition fans is, as you said throwing petrol on a fire.