"Religious topics" refers to subjects or ideas that are related to religion or belief systems. It includes discussions or studies about various religious practices, beliefs, traditions, texts, rituals, or ideas about spirituality. Full definition
Nevertheless, the writings of philosophers on religious topics are better described as philosophy of religion. (religion-online.org)
The most obvious and simple is to teach religious topics in as open a format as one teaches other topics. (firstthings.com)
Second, I doubt you could even name more than 5 founding fathers without consulting the internet, let alone tell me what even two of them thought of religious topics. (religion.blogs.cnn.com)