Why are these three films called "Idiot", "Breaking the Waves" and "Dancing in the Dark" as the trilogy of conscience?

Lars von Trier (also translated as Lars von Trier) was born in a Danish middle-class family on April 30th, 1956. His first 8 cm camera was a birthday gift from his grandmother, and the free growth space provided by his parents made his interpretation of images infinite. Lars Vontyre graduated from the Danish Film Academy, and won the Best Film Awards of198/kloc-0 and 1982 Munich Film Festival respectively for his works "Nocturne" and "Images in Relief" in his college days. 1984 filmed the first feature film The Elements of Crime, which was called the "European Trilogy" together with Epilepsy and Europa. 1995, he and three other directors signed the "dogma95" declaration. What they want to convey is a rebellion against modern movies. When shooting a movie, they should abide by the rules of holding a camera, not turning on the lights and receiving live broadcasts. According to this dogma, he made Idiot, this film and Breaking the Waves. At present, I am writing a sequel to Variations in the Night, which is the second Mandre in the American trilogy.