There's a part of the story where demons are negotiating peace between a town and attacking demon forces. As soon as Frieren hears of this, she says the town is doomed.
Moral of the story is if your problems are caused by a group, don't expect a member of that same group to help you solve that problem.
Demons are not analogous to orcs because the Bible isn’t lord of the rings. There are good reasons to parse biblical demons as representative of real world evil.
This is not to say that these anime demons are Jews. I just think your equivalency is inaccurate.
They’re not biblical demons either