America’s defining political disputes have centered on Protestant values

Evidence

In 1864, that proposal failed, but subsequent political disputes over women’s suffrage, funding of parochial schools, public school science curricula, and abortion have centered on the attempt to infuse Protestant Christian values in public life. — Sahar F. Aziz, The Racial Muslim, 171

Categorization

• XREF: Connects to separation-of-church-and-state debates and the broader thesis about Christian nationalism in American politics.
• corroborated: 2 independent passages support this claim — Sahar F. Aziz, The Racial Muslim: When Racism Quashes…, 171