Irredentist homeland claims that sustained the association later caused its political marginalization

Evidence

Ironically, it was this very core of separatist Heimatpolitik that, according to Ahonen, expedited the expellees’ integration into West German society. While it functioned as a sort of narcotic against massive suffering in the first postwar years, this clinging to an increasingly unrealistic irredentism alienated many of the associations’ members, gradually marginalizing the organizations politically from the 1960s. — Manuel Borutta and Jan C. Jansen, Vertriebene and Pieds-Noirs in Postwar…, 83

Categorization

• XREF: Speaks directly to the reader’s core question: a solidarity engine (irredentist grievance) both consolidated and eventually collapsed the group’s political relevance. — connects to: Somali irredentism threatened the sanctity of colonial African frontiers — I.M. Lewis, I. M. Lewis, A Modern History of the Somali_ Nation…, 490; Ethnic nationalism within the party defeated Americanizing Marxism
• SEED: Material for an essay on how the very grievance that sustains a movement proves self-limiting once it becomes unrealistic — the BHE-style decay dynamics.

Broader Connections

• Somali irredentism threatened the sanctity of colonial African frontiers #expands (0.90) — I.M. Lewis, I. M. Lewis, A Modern History of the Somali_ Nation…, 490
• Ethnic nationalism within the party defeated Americanizing Marxism #exemplifies (0.75)