When I began my education in a typical public school of the time, at least for the southern U.S., Bible reading was often a part of the school day’s beginning. I can’t say I remember much about those readings or whatever comments the reader, usually the teacher, might have made.
My family was actively engaged in a local church. The church became a major part of both my religious and social life as I grew. My Christian faith developed within my family and that local church. Evangelism in the community was carried out by individuals reaching out to friends and neighbors, as were welfare activities as well, such as food pantries open to all.
Personally, I’ve concluded that making the Bible a mandatory part of the school curriculum would result in a watered-down kind of religion, not at all helpful in spreading the good news of Jesus.
I remember several years in Muslim majority countries, where Islam was a part of national life. In some cases, no other religion was allowed. Religious observance appeared to me to be a rote exercise, without much personal meaning.
Those experiences turned me off from supporting any kind of state religion. The U.S. Constitution’s prohibition of a state-sponsored church is, in my opinion, one of its wisest sections. I think it’s also one reason Christianity, being chosen voluntarily, has seen seasons of great growth throughout the centuries.
I believe Christians should have the right to worship in any country. I also believe in freedom of worship for all recognized religions in the United States. That means also that no religion is officially favored.
If you want to ensure that Christianity or any religion loses its vibrancy, make it a state religion.