answered your own question there. It wasn't a foul by Riise on Smith, the song was first coined following a Riise free kick v Man Utd so there is a certain dark and quick-witted bit of humour to the song. The majority of reds applauded him off the pitch and many, like myself wished him a full and speedy recovery. There'll be fans of opposing clubs who wont care about Sissoko, i couldn't give a schit what they think tbh.