From the Old Testament reading at Morning Prayer:

The Lord said to Joshua, ‘See, I have handed Jericho over to you, along with its king and soldiers. You shall march around the city, all the warriors circling the city once. Thus you shall do for six days, with seven priests bearing seven trumpets of rams’ horns before the ark. On the seventh day you shall march around the city seven times, the priests blowing the trumpets. When they make a long blast with the ram’s horn, as soon as you hear the sound of the trumpet, then all the people shall shout with a great shout; and the wall of the city will fall down flat, and all the people shall charge straight ahead.’
(Joshua, chapter 6, verses 2-5, NRSV)

Before we judge too harshly those who think God wants them to kill lots of people…

This is a detail from a window in St. Mary’s church, Eynesbury, Cambridgeshire.