You're absolutely and 100% confusing "silliness" and "ignorance" .... It's a joke, not lack of understanding as to where NDSU relates in college football. Do you think the poster doesn't know UND plays FCS? Silly does not equal ignorant.
Actually, no. UND is at the top level of competition for every other sport besides football. Even so.... it's a joke.
Ripping each other is what rivals do. Are you saying you've never taken a jab at any of your rival friends? I know I have. No one said that what they've done isn't impressive. It is. The joke is a cheap shot and is meant lightheartedly. Again.... it's a joke.
This whole thing makes you look foolish for looking so hard into it. The original post was intended as silly and funny. Your reaction is much more foolish, IMO. It's a joke. Again.... pump the brakes.