Addressing Sin in Christian History: Talking to Kids About the Crusades 

Today's question says, "How can I talk to my children about ways that historical Christians have sinned? The Crusades, in particular, are an important topic where we are. I've said that someone who believes X doing bad things doesn't disprove X. Is this enough?"
Curriculums mentioned:
Biblical Worldview - foundationworldview.com/curri...
Comparative Worldview - foundationworldview.com/curri...