evidence: Republican Rep. Marjorie Taylor Greene explicitly labeled herself a Christian nationalist on Saturday. This shocking statement by a sitting member of Congress should serve as a wake-up call to everyone, and particularly, I believe, to Christians. [...] For years, I have been closely tracking Christian nationalism and sounding the alarm about it. Greene’s recent comments mark an alarming shift in the public conversation about Christian nationalism. [...] As historian Jemar Tisby has written, "[to] follow Christ is to reject the Christian Nationalist ideology. Marjorie Taylor Greene and her allies can follow Jesus’s teachings or the teachings of Christian Nationalism, but they cannot do both."