[2] In April 2011 at the Scottish Cup semi-final against Aberdeen, police officers attempted to remove a supporter who had set off a flare inside the stadium.

[3] In April 2011 some members of the Green Brigade were not sent season ticket renewal forms after the club threatened to disperse the group around other sections of the stadium.

[7][8] At a match against Aberdeen in November 2010, the Green Brigade unfurled two banners with the words "Your deeds would shame all the devils in Hell.

[citation needed] Criticism from the wider club was again directed at the Green Brigade for displaying a banner reading 'Victory to the Resistance' accompanied with Palestinian flags during a match.

On Oct 7 2023, Celtic’s Green Brigade unfurled two huge banners declaring “Free Palestine” and “Victory to the Resistance”.On 25 October 2023, thousands of Celtic fans, including members of the Green Brigade, flew the Palestinian flag and banners in support of Palestine during a UEFA Champions League group stage match against Atletico Madrid.

[19] Fans dedicated the song 'You'll Never Walk Alone' in solidarity with Palestinians in Gaza amidst the Israel-Hamas War which resulted in thousands of civilian deaths.

[22] On 23 December 2023, following a resolution with the Celtic board, the fan group returned to Celtic Park with another display of solidarity with Palestine, with banners quoting 'A Prisoner's Christmas Song', expressing sorrow over the tragic death toll of Israel's war in Gaza which had resulted in over 20,000 Palestinians killed, including 8,000 children, at the time of the match.

[23] The Green Brigade expressed solidarity with Celtic manager Neil Lennon, who in 2011 had been attacked on the trackside by a Hearts supporter at Tynecastle and allegedly been sent letter bombs.

After the last match of the 2011–12 season, Lennon 'presented' the Scottish Premier League trophy to the Green Brigade by placing it in front of the section where they sit.

"[24] In November 2012, the Green Brigade organised a full stadium pre-match card display against Barcelona to celebrate Celtic's 125th anniversary.

[27] The Offensive Behaviour at Football and Threatening Communications (Scotland) Act 2012, which gave rise to the protests, was eventually repealed in April 2018.

In the leg held at Windsor Park, some Linfield supporters threw bottles and coins at Celtic players and sang sectarian songs.

[31] The banner "showed a paramilitary-type figure" next to an image of Brendan Rodgers, the Northern Irish manager of Celtic, under the words "Brendan's undefeated army"; the Daily Record accused the Green Brigade of designing the flags, and also claimed that the "undertones of the imagery were also clearly referring to the politics of Ireland while a section of Celtic fans were also heard singing pro-IRA songs during the powderkeg tie with the Belfast side.

Linfield are seen as a Protestant Unionist club in Northern Ireland and fans of both sides had earlier hurled abuse at each other as they made their way into the stadium".