Complex sentence: Moore later explains that 3:00 AM is the "devil's hour", which evil spirits use to mock the Holy Trinity, being the opposite of 3:00 PM, traditionally thought to be the hour at which Jesus died.
Split into simpler sentences: Moore later explains that 3:00 AM is the "devil's hour", which evil spirits use to mock the Holy Trinity. Significantly, it is the opposite of 3:00 PM, traditionally taken to be the hour at which Jesus died.