There's a big difference between a scholar and a propagandist. The scholar cares about the historical truth. The scholar wants to know how people lived in ancient past, and what they did, about their ancient cultures. Usually the scholar has to work with probabilities and possibilities.
Certainties are few.
When trying to reconstruct distant events, mistakes can occur. The propagandist, OTOH, has an Agenda. Part of the job of the propagandist is to try to find mistakes in other people's work. It is very important for the propagandist to determine that some researcher is wrong about some things. It is part of the agenda to discredit researchers who threaten the all important Agenda, the preconceived ideas of the propagandist.