He justified his action with his religion. Not much different from SS who burned Slavic villages from Czech to Russia down to Serbia because their National Socialist ideology considered Slavs inferior. Kalk.
Glad you brought in the comparison to war, for this one is fought on many fronts too. and war has it's Lidices, Oradours, May Lays and Dresdens. and Orlandos? All targets are perceived to be inferior.