No. It's explicitly anti-demon. I don't like it, because I'm not the target market, but it's fine. IMHO Hazbin Hotel is both much more offensive and much more dangerous. It twists pseudo-scriptural myths about Lilith and Lucifer into a pro-demon and pro-hell narrative. Even that would be fine if everyone realizes it's just for fun. But it's much closer to the line where these ideas can become part of the cultural understanding via osmosis, in the same way everyone thinks there were three wise men even though scripture doesn't back this up in any way. But the kind of Christians who get offended by kpop demon hunters don't care because the title isn't shocking, so they let the things that are actually problems slip right past them without comment.

I grew up in a conservative Christian household that was firmly in the grip of the fear wave in the 90s, so maybe I can provide insight.

As another commenter mentioned, the word demon is an instant red flag generator to these people. But even if they understand that the heroes are anti-demon, there are some other aspects they may find unpalatable. Believe it or not, providing cultural context will likely only upset this camp further. A culture that has a concept of the supernatural outside the bounds of their theology immediately invokes fear and guardedness. In this context, the idea that humans can fight the supernatural outside of God's power would be seen as humanism at best, or possibly occult.

Understand that a lot of these people grew up in a culture of fear, especially fear of other theologies. Christians are commanded to not let the sinfulness of the world infect them, and unfortunately people take that to mean stuff like this instead of things like greed, pridefulness, or any of the host of abhorent things defining the American evangelical movement right now.

Having grown up in this setting, I had heard anecdotes of people with 'Eastern' demon possession of something because they practiced karate. There is no discerning on their part between local dieties, eastern demons, and western demons. Anyone with an interest outside the Bible is supposedly afflicted with something by letting the secular world in.

Its almost entirely just because it has the word demon in it. They hear that and stop Listening my sister was 17 when it came out and my parents still wanted to ban her from watching it it didn't matter that we explained the cultural context around the Korean setting, it had demons and was therefore evil. We did eventually convince my mom to watch it and she did admit that it is explicitly anti demon. But it still shocks me how much it took to get her past the word demon.

I think all that taking offense in fiction is more of an evangelical thing anyway. I've heard the Christians(?) in the USA have always been offended and complained about rock music, Pen and paper roleplaying games, computer games, Harry Potter... And they probably complain about Korean folklore as well... I think we also have people like that where I live, but it's a tiny minority perspective on the world. I've grown up way more liberal.