Exactly. Though honestly this is kind of an aside, since haven't really subscribed to the notion that the manga's kingdom is doing nonsense to begin with, since we haven't seen the higher ups PoV.
Nonsensical decisions can be explained by the government being incompetent and complacent, both in fiction and real life. An organization making catastrophic error in conduct by being generally corrupt, stupid and/or unambitious is true to life.
And from another angle entirely: a deterrent is...
Yeah, but he's not talking about "acceptance of a multi-racial society". He's explicitly talking about demography, and how the (human supremacist) ideology would lead to conflict when put in the (multi-racial) society.
It's very explicit even in original Japanese.
I feel like the context is very clear.
The line of thought started with the fact that he's sending "expendable soldiers with human supremacist ideology to the front line."
Then an explanation of why the ideology took root in the country.
Then the concern that this ideology would bring about...
Reading the title, I thought it would be about a detective from the modern world using modern investigative methods and forensic science to solve crimes in a medieval setting, but he actually solves crime using magic skill?
Furthermore, the girl he possesses already has the same ability and is...
Gramps retired 30 years ago. His son might not even have been born yet, and he didn't necessarily grow up within that culture. The Seekers back then were specialists, not streamers. The strongest among them might have been famous within the trade, but the general public wouldn't necessarily know...
The four demon subordinates could simply hail from four different nations and cultures.
And Helen simply changes clothes. You can see her, wearing the same clothes as the rest of the maidservants, in chapter 1. And see her finishing changing at the start of this chapter.