Moses scratched on a tablet of stone THOU SHALT NOT KILL. Moses and Joshua were told "And you will destroy all the peoples that the LORD your GOD will give unto you." They destroyed sixty cities along with many walled and unwalled villages. (And the inhabitants.)
Pope Urban 11 promised peasants forgiveness from God for all their sins if they joined the crusade. Christians killed thousands of Muslims and Jews. Jewish and Muslims inhabitants fought together to defend Jerusalem. Crusaders entered the city on 15 July 1099. They massacred the inhabitants and pillaged the city.
In 1155, Pope Hadrian
IV (an Englishman) gave Ireland to King Henry II of England. He urged Henry to
invade Ireland to bring its church under the Roman system and to reform the
barbaric and impious people of Ireland. (They were neither).