Even though Cao Liangjei thought his marriage with that woman wouldn't make any noise around the kingdom, things didn't go that way. Contrary to his expectations, he ended up seeing every single servant and every single citizen looking forward to that marriage.
Sure, they hated demons, but the demons these people hated were only the ones remaining in the Cao Dynasty. The ones from Xiu Kingdom were still far away. After the kingdom achieved a level of peace and prosperity, they managed to advance one step further from the Cao Kingdom, surprising every single one of them. Thus, the theory that Xiu Kingdom residents weren't real demons circulated throughout the public.
Of course, the soldiers and imperial officials didn't believe those tumors.
