I'm not the only one who finds this reprehensible. Statement from the Organization of American Historians:
"the historical interpretations presented at National Park Service sites are essential places that offer the public “opportunities to connect personally with the past and to engage with the intricacies and nuances of America’s history and the rich, evolving tapestry of American experiences.” They serve as a critical counterpoint to the current administration’s “aggressive push to flatten history into a single celebratory story.” The OAH rejects these recent federal actions and the systemic efforts to distort the historical record and impose through executive orders and actions a narrow vision of the American past. The suppression of evidence-based history does not restore sanity; it endangers democracy."
https://www.oah.org/2025/06/18/statement-in-response-to-secretary-order-3431-and-censorship-of-history-in-the-national-park-service/