For the landed and economically powerful, the Joshua and Promised Land traditions can be disturbing. The struggle of poor people for land is God's struggle.
Moral legitimacy is on their side.
Furthermore, since God is the true owner of the land, its just distribution and management are ethical imperatives. God gives the land as an inheritance for the purpose of providing the space and fulfilling the needs that life requires. Therefore, land systems and other material arrangements form the basis of a just society. Often these powerful interests will claim moral authority for themselves. They want to show the struggles of the poor as immoral.