The correct answer to this open question is the following.
Both perspectives are right. assuming my role as a historian, I can say that both perspectives are correct because those were the different realities that slaves and priests lived during ancient Egyptian times.
For the unmedicated slave, the Egyptians were cruel and merciless people. Why? Because they exploited slaves. They treated slaves badly. They were seen as "tools" to work in the fields, in construction, and at the service of the owners.
Of course, priests had a totally different point of view because they belonged to a social class that was much respected in ancient Egypt. So elite classes treated them well. If they treated them in the right way, priests did not have anything to complain about. That is why they described the Egyptians as peaceful and deeply religious people.
So we can conclude that different realities equal different perceptions.