I don't think he is saying that. I think you could take out North Texas and insert any opponent in that space and it makes sense regardless if we are facing Denton Ryan or the Dallas Cowboys this week.
Here's the transcription of his answer to that particular question in full:
“Yeah, they’ve got an aggressive, multiple front defense. Phil Bennett has been a defensive coordinator and a head coach, and he does a really good job of mixing in pressure with zone, and he's got both odd and even fronts, drop eight, zeroes. So it's always a difficult challenge to have an answer for all of it. Offensively, they run a similar style to Tennessee. Not as much tempo, but after what happened last week, I wouldn't be surprised if they didn't pick it up. RPOs, run pass options. And so it's a challenge. Every week is a challenge, but for us the biggest challenges is not going to be North Texas, it's going to be us, and making sure that we have the right frame of mind and play at a high level.”
And here is another response to a question where he was asked about being a 20 point favorite in the game:
“I don’t ever worry about the spread. I'll worry about what I see on tape, and it's gonna be a difficult matchup. So it's gonna be exactly what our weaknesses are versus their strengths. That’s what good coaches do. So we’ll find out early.”
I suppose he could have more eloquently made his point but I think you are really parsing things to interpret them as being disrespectful of UNT. Maybe they are overconfident and not taking this week seriously (they aren't for the record) but I don't think anything Eli said today would be indicative of that attitude. Just my opinion though.