A lot of folks over the years have noted that ‘Secular Humanism’ has many of the characteristics of a religion.
Here is an article in the Christian Post where a Christian scholar makes that very point: “Secular Humanism as Religious as Christianity, Argues Scholar”
David Noebel has written a book on the issue: Clergy in the Classroom: The Religion of Secular Humanism
He points out that schools function as the major forum for Secular Humanism where some teachers act like clergy supporting their humanist worldviews.