A true Cultivation sect wouldn't have acted this way.
Previously, various sects in the Southern Domain had set their sights on Youxin Country and had the strength to seize it by force, yet they did not directly make their move.
Instead, they chose to tolerate the demons, planning to completely sever the Qing Immortal Sect's sovereignty here before entering the scene themselves.
They aimed to perform a demon-subduing and evil-clearing act to restore peace and order to Youxin Country.
Their goal was to occupy a position of moral righteousness.
The Jiuzhou Immortal Gate spent nearly ten thousand years to occupy the entire Western Domain.
The slow progress might also have been part of this process.
Even Jintai Gate, before Jiuzhou Immortal Sect had infiltrated the Southern Domain, did not directly invade Qingyang Country to take it for itself, did it?
Instead, they chose to support a local branch there, slowly expanding their influence and infiltrating the country.