BT Sport Football revealed the banner in question:
According to Jack Gaughan of the MailOnline, Wenger said:
There's nothing disappointing for me. I do my job. Look at the history of the club, since the club exists, and you will see that I have nothing to be scared of.
I don't care. I do not want to speak about that because it is always the same story. It is enough now. If you have any questions ask other people.
Do you know someone who has won it [the FA Cup] more than me? We judge the season afterwards and I'm quite amazed so many people judge it so early.
We have not given up anywhere and you will see that in the coming weeks. This club has been in a much worse position than it is today.
Wenger found support from his former charge Ian Wright, who defended him on Twitter in an argument with one of the supporters to have held up the banner (tweet contains NSFW content):
Arsenal will face Watford at home in the quarter-finals of the competition on Sunday.
Wenger called for Arsenal fans to judge their season at the end of the campaign, with the Gunners still in the FA Cup and eight points off the top of the Premier League with nine games to go, per BT Sport Football:
It is not the first time Arsenal fans have displayed it, as the very same banner was held up in a match with West Bromwich Albion in 2014:
The Frenchman also found an ally in Hull manager Steve Bruce, per James Olley of the London Evening Standard:
Arsenal have certainly endured a difficult few weeks after losing back-to-back games with Manchester United and Swansea City before drawing with Tottenham Hotspur in the north London derby on Saturday—a game in which they threw away a lead after going down to 10 men before battling back.
Even their win Tuesday night—which saw out-of-form duo Olivier Giroud and Theo Walcott grab a brace each—was marred by injuries to three key players to add to their growing list of patients in the treatment room, as Sky Sports News HQ revealed:
At least one of them—the injury to Aaron Ramsey—might have been avoidable, as Olley noted:
The Gunners fans' frustration is understandable given recent results, and the club are all-but out of the UEFA Champions League at the round-of-16 stage yet again barring a remarkable comeback against Barcelona at the Camp Nou.
However, to turn on Wenger now will achieve little and could perhaps even negatively affect some of the players, as not all will be able to shrug off such criticism as easily.
John Cross of the Daily Mirror was unimpressed with the banner but otherwise praised the travelling Arsenal support:
They have an excellent chance of winning the FA Cup for a third consecutive season with the likes of Manchester City, Liverpool and Tottenham Hotspur already out, and the potential to face either Crystal Palace or Reading in the semi-final should they overcome Watford.
Winning the Premier League title will certainly be more difficult, and the Gunners could slip behind Man City if they win their game in hand, but after snatching a point at White Hart Lane they're not yet out of the title race—not to mention their run-in includes strugglers Palace, Sunderland, Norwich City and Aston Villa.
Arsenal fans would be better off waiting for the dust to settle before venting their frustrations so as not to impact the team's performances on the pitch.