http://boards.footymad.net/forum.php?tno=297&fid=148&act=1&mid=2120427444
http://www.redcafe.net/f7/joey-barton-celebrates-nazi-salute-306608/
http://community.betfair.com/football/go/thread/view/94070/25682537/Barton_celebrated_with_NAZI_SALUTE
Watching the videos its obvious team mates had made jokes about his tash and hitler, if it was anoyne else nothing would be said.