It is true.Let me explain. (I do this work, non-profit) so I know a little about this.
Demons do have names, as they once angels, but are now fallen angels. Their actual name may not be "lust", but that is a sin, a negative thing, that they will accentuate in someone. So, when someone asks a demon (and it is rare this is done) what their name is, and they say something like "hate", that means that is the emotion in th eperson they play off of. Like a title, but not a name. My name is Heidi, and I answer to that legally and personally. But, many callme "mom", I have nicknames, I am known as "The Ghostlady" on a radio show, I am known as "daughter", "wife" and other titles I am, and so on. So, those "names" are just titles, not their actual name.
I have even heard one called "Spirit guide" once. There are MANY! Whatever bad or misleading thing you can think of, anything that is not good, a demon can play off of and call itself.
Hope I explained that well enough.
Heidi