@givemersspls
Your sense of honour and their sense of honour is different. It is the same as condemning others following your own common sense. Because your common sense is not universal and is not shared with people of other cultures.
Although Bushido was created after the Sengoku era, the basic tenet of Bushido was in practice for long before that and has nothing to do with chivalry. Under Bushido, everyone's a fair game. There is no 'civilian' to be considered 'off-limits'. If your samurai can't protect your peasants from other samurais, then that's your own fault for being weak. So if a samurai massacres a village, that's on their lord's head for being unable to protect his subjects.
There is no dishonour in killing unarmed villagers according to the Bushido code. They are a significant part of the lord's strength, providing food, income and fighting as ashigaru for the lord during wars. For that reason, villagers were not considered 'civilians' but 'strategic resources'.