Mike Johnson is a delusional zealot He’s an educated man but his knowledge of history is nil. Someone should tell him about the centuries of religious wars in Europe that shaped the founders beliefs about religion and the state: Mr. Johnson, a mild-mannered conservative Republican from Louisiana whose elevation to the speakership on Wednesday followed weeks of chaos, is known for placing his evangelical Christianity at the center of his political life and policy positions. Now, as the most powerful Republican in Washington, he is in a position to inject it squarely into the national political discourse, where he has argued for years that it belongs. Mr. Johnson, 51, the son of a firefighter and the first in his family to attend college, has deep roots in the Southern Baptist Convention, the nation’s largest Protestant denomination. For years, Mr. Johnson and his wife, Kelly, a licensed pastoral counselor, belonged to First Bossier, whose pastor, Brad Jurkovich, is the spokesman for the Conservative Baptist Network, an organization working to move the denomination to the right. Mr. Johnson also played a leading role in efforts to overturn the results of the 2020 presidential election and has expressed skepticism about some definitions of the separation of church and state, placing himself in a newer cohort of conservative Christianity that aligns more closely with former President Donald J. Trump and that some describe as Christian nationalism. “Speaker Johnson really does provide a near-perfect example of all the different elements of Christian nationalism,” said Andrew Whitehead, a…