Yu Hong was taken aback. Most cultivators would try to resist, this was especially true of elites in the Nascent Divinity realm and above. They usually had the support of their sects. Therefore, the Nether Sect chose to conquer the Clarity Sect, the Righteous Sect, and other major sects. They absorbed the various elites to intimidate other grand cultivators. This way, the other grand cultivators would not dare to make rash moves. Meanwhile, in Great Yan, the Nether Sect could focus its attention on dealing with the Imperial family.
As for the cultivators they encountered during the chaos, such as these people before Yu Hong, they would usually capture them to avoid any unwanted developments in the future. When things were calmer, they would release those who were supposed to be released and kill those who should be killed. Conquering a city was a cruel undertaking, after all.