Danny Shittu is shocked by the fans that shamed Millwall at Wembley.
The Lions skipper, 32, was disgusted by the ugly scenes during the second half which marred their FA Cup semi-final defeat by Wigan.
Those responsible are facing lifetime bans from The Den - and Shittu is angry they have ruined the club's image once again.
He said: "At this club you do five things right and one thing wrong and it sets you all the way back again.
"These people need to understand we are fighting so hard to put this club in a good light because it deserves to be in a good light as we've got so many good people that support us.
"There's a lot of good things at this club. There's a minority trying to mess up the name of this club and it has got to stop."