It's just a political game
As the saying goes, when misfortune occurs, it comes crashing onto you.
That was what was happening currently to the ruling forces.
The revelner disease that was ravaging the South, the Hevertec kingdom, actually spread to other ruling forces. And obviously, it looked like someone was spreading it with ill intention through the water banks.
Being aware of the threat posed by this plague, the higher-ups of the ruling forces gave out orders of burning the infected with no hesitation.
This kind of immoral order made all the natives worried and even reproach such actions.
However, Losing the trust of the citizens was better than dying. Kings and emperors ignored the complaints of the masses with iron-hard resolve.
At that time, people could only drink water generated from water crystals or enchanted and magical devices made from it.