Well, it because it mostly will not effect their living. People tend to respond to incentive. So if a cause is pretty much will not affect their personal living in anyway, most people will usually give little thought about it or ignore it completely. This is why those reports did not have a greater effect<span />
The key point is that the motivation to invade largely Christian and Jewish Spain was based on both the wealth from the initial conquest and the wealth generated by the jizayh tax on the population.
