‘Sinn Féin traitors!’: how far-right rhetoric derailed party’s path to power in Ireland

The image of a campaign adviser feeling a cold, sharp sting on her neck while knocking on doors is more than a personal anecdote—it is a snapshot of a political realignment. Sinn Féin, long seen as the standard-bearer of a leftwing, progressive Ireland, found itself caught between its own history of grassroots activism and a new wave of populist anger that did not fit neatly into the old left-right divide. The far-right rhetoric described in Fenton’s book did not simply attack the party; it attacked the very premise of an open, multicultural Ireland that Sinn Féin had hoped to champion. What makes this story significant is the way it complicates the narrative of Irish politics. For years, the conventional wisdom was that Sinn Féin’s momentum was unstoppable—that the party would eventually lead a government and reshape the country. But the rise of anti-immigrant feeling exposed a vulnerability: a party built on the politics of identity and national liberation now had to navigate a different kind of identity politics, one that its opponents could weaponize against it. The “Sinn Féin traitors!” taunt is telling—it frames the party as having betrayed its own people by welcoming outsiders. This is not just a story about Ireland. Across Europe and North America, progressive parties have struggled to respond to the politics of migration, often finding themselves outflanked by populist movements that speak in simpler, angrier terms. Sinn Féin’s experience suggests that even a party with deep community roots and a clear leftwing agenda can be derailed when it fails to anticipate the emotional power of nativist rhetoric. The book’s revelations will likely fuel debate about whether the party’s leadership was too slow to adapt, or whether the forces arrayed against it were simply too strong. For readers of Poli Split, the lesson is one of balance: the far-right did not win by offering a better economic program, but by tapping into fears that the political establishment—including Sinn Féin—had ignored. Whether that fear was justified or manufactured is a matter of perspective, but its political consequences are undeniable. Fenton’s account, as reported by The Guardian, provides a valuable insider perspective on how a movement can lose its footing, and how quickly the political ground can shift beneath even the most confident campaign. Source: <a href="https://www.theguardian.com/world/2026/sep/05/sinn-fein-traitors-how-far-right-rhetoric-derailed-party-path-to-power-in-ireland">The Guardian</a>