They want to show the struggles of the poor as immoral. Such arguments have an impact on the poor. After all, they too are concerned with personal morality. Some evangelicals in Nicaragua have hesitated to receive land through the national land reform program. They believe they would be accepting stolen property.
Moral arguments can be powerful, even when they are smoke screens for evil.
Alternative ethics means that, in relation to usual justifications, the same material supports another position. We have seen that the Joshua story has been used by the powerful to morally justify taking people's lands. But an alternative reading of the same story urges a contrary or different moral position. The story still justifies taking land, but not by the rich. The poor are the ones who are morally justified as they struggle to gain or keep land.