IAN Holloway insists Millwall will need Ricardo Fuller's "passion" during the remaining months of their season.
Fuller prompted anger from Lions fans when he gestured to the away end during Saturday's defeat to Blackpool.
Holloway says Fuller has apologised for his behaviour and now hopes a line can be drawn under the incident.
Chief executive Andy Ambler, meanwhile, believes unity will be essential as the club battles to avoid relegation.
Ambler said: "Players can't react to fans in that way. End of. Ricardo knows that. So is he at fault? Yes.
"However, if he'd have sloped off after being substituted, not looking bothered, that would have been more worrying for me.
"He showed passion by reacting and all of our players have got to show the passion that Riccy has got to get us out of this situation.
"The fans, players and directors all need to be pulling in the same direction over the next couple of weeks if we're going to be in the Championship next year."
Holloway, speaking to the club's official site, added:
"Like the fans I want every single one of Millwall's players to be passionate and care about doing well for this club, and Ricky is certainly one who has those qualities in abundance.
"Ricky had scored two for us the week before and I'm very pleased with his contribution this season.
"I'm lucky to have him here because he is the type of player who gives absolutely everything for the cause.
"He leaves nothing out there on the pitch and if he wasn't like that, and he didn't try his absolute hardest, then I wouldn't be picking him."