general secretary of the Celtic Supporters Association said he was "genuinely sorry" after tweeting that it was a "problem" that the Protestant workers who built the Titanic "didn't sail on it". Irish republicanism Celtic supporters have traditionally been associated with support for Irish republicanism, and the flying of Irish flags at matches is common. Some groups of Celtic supporters also sing or chant Irish folk and rebel songs, which express support for the IRA. In 2008 and 2010, there were protests by groups of fans over the team wearing the poppy symbol for Remembrance Day, as it is a divisive symbol in Ireland. Celtic have expressed disapproval of these protests, saying they are damaging to the image of the club and its fans, and that they will ban those involved. In November 2011, Celtic were fined £12,700 by UEFA for pro-IRA chanting from some Celtic supporters. In response to this in their Europa League game against Udinese, Celtic fans were seen to have unveiled a banner reading "Fuck UEFA". The club condemned the act, banning for life the supporter responsible for the display, whilst UEFA fined Celtic €25,000 in relation to the incident and related events during the match. In December 2013, the club were fined £42,000 by UEFA for an "incident of a non-sporting nature" in relation to a display shown by a section of the Celtic support before their Champions League group stage tie against Italian side AC Milan. The banners displayed by the Green Brigade ultras group showed portraits of Scottish hero William Wallace and Irish hunger striker Bobby Sands side by side along with the text: "The terrorist or the dreamer? The savage or the brave? Depends on whose vote you're trying to catch or whose face you're trying to save". After the disciplinary hearing, the club issued a statement in which they condemned the banners and stated that the actions of a "small minority must stop". After the incident, Celtic relocated 250 supporters from section 111 and issued temporary bans to over 100 more. The Green Brigade The Green Brigade are a group within the Celtic support who style themselves on the ultras groups found amongst many European and South American football supporters. They were formed in 2006 and describe themselves as "a broad front of anti-fascist, anti-racist and anti-sectarian Celtic supporters". The Green Brigade have organised various displays at Celtic matches involving banners, flags