This may play well to those who have never actually read the Bible, Torah, or the Qur'an (all of which detail Joshua's exploits). However, this is an egregious misrepresentation of the facts.
First of all: there is no story in the Bible which mentions Joshua raising his arms in supplication.
The book of Exodous (17:11-12) describes a scene where the Israelites are waging war against the Amalakites, to seize the promised land... " and it occurred that as soon as Moses would raise his hands up, the Israelites would prove superior: but as soon as he would let his hands down, the Amalekites proved superior". So they had him sit on a rock, while Aaron & Hur held his arms up until "Joshua vanquished Amalek and his people with the edge of his sword".
Clearly, it was not Joshua raising his arms, but Moses. Joshua was busy acting as a general on the battlefield: conducting the righteous slaughter of the (inferior) Amalakites.
Of course Joshua would later become successor to Moses, and ultimately lead the Israelites on a campaign of bloody mayhem to capture the promised land "of milk and honey"...
We've all heard how he brought down the walls of Jericho, but even more noteworthy: "It was then that Joshua proceeded to speak to God, and he went on to say before the eyes of Israel: Sun, be motionless over Gibeon, and Moon, over the low plain of Aijalon. And no day has proved to be like that one, either before or after it, in that God listened to the voice of a man". Joshua (10:12-14)
Not only did Joshua command the sun and the moon: "God hurled down great stones from the heavens so that they died. There were more who died from these stones than those whom the sons of Israel killed with the sword".
Joshua (10:11)
"Joshua had conquered the land, and it was available". Joshua (11:16)
"Each tribe was given an allotment, but had to drive out the enemy. There was to be a gradual occupation of the land by each tribe".
Joshua (11:23)
"When he was old and well advanced in years Joshua convened the elders and chiefs of the Israelites and exhorted them to have no fellowship with the native population because it could lead them to be unfaithful to God".
Joshua (23:7-8)
Beyond question, the book of Joshua can be summed up with one key word: "possession".
...yet today we are fed a whitewashed version: the Mormon pioneers simply envisioned Joshua raising his arms in prayer... as they went about their business of displacing the indigenous tribes of California.
Hence, Joshua Tree National Park: made possible by virtue of genocide.
