This study examines the influence of local norm shifts driven by white supremacist ideology on hate crime reporting by US law enforcement agencies. Results show a substantial association, indicating a threefold increase in expected hate crimes reports in counties experiencing a spike in local hate group activity. Specifically, Republican vote share acts as a moderator, reducing reported hate crimes by 23% in counties with strong Republican support and right-wing hate group presence. Adjacent Republican counties also show a 13% reduction in expected reports, suggesting a spillover effect. Beyond local politics, a regional impact is evident; Northeastern counties with higher right-wing hate group presence show a 23% lower incidence rate. Using longitudinal data from the FBI UCR, SPLC, MIT Election Lab, and the US Census (2010–2020), through negative binomial regressions, this study highlights how right-wing hate groups can affect law enforcement’s enforcement of general civil rights depending on the local context.