The reason why we are triggered by the use of the name "devil" for any demon in DxD is specifically because it is NOT a common usage of the name as "the Devil" usually refers to Satan and to no one else, which your definition confirms because the name "Satan" means "accuser" as the Shaitan was the judge of souls in the original hebrew Bible before the roman empire murdered Jesus and invented christianism to appease his rebelling people and turned the judge of souls "the Shaitan" aka "the Accuser" into the source of evil "Satan" aka "the Devil" just to put all the blame for humans' sins onto the back of a scapegoat, "This is all the Devil's fault, this is all Satan's doing, we humans are innocent, we are victims of the Devil's schemes", ha, humans are hypocrites, they invent imaginary evil beings just to blame them for everything and not take responsibility for their own actions. 😒
But I didn't know that the name "Devil" was of greek origin but I SHOULD have known since the roman empire was the successor to the classic greek civilization and that they took everything from them, I knew that the christian god Deus came from the greek god Zeus but I didn't know that the christian Devil came from the greek Diabolos since it is not a well-known concept in classic greek as we mostly know Hades and we don't call him "devil" nor "demon", only "god of hell", but then again, he was considered a god just like Zeus because greek mythology was polytheist whereas roman christianism is monotheist, only one person is considered as a god so I guess they had to use another concept than a god to call the antagonist of Deus and they used the barely used greek concept of "diabolos" that they turned into the latin "diabolus" then eventually "Devil". 🤔