You are only reading what you want to see. The points No Matter What made in his post about Pats fans are all things posters on here have said before every game this year. The things NMW posted that he read are not all that giddy or overconfident - they are things people say on here every week about every game.
There are many confident, positive posters here that post the same types of things the Pats fans were saying. If you look for the negative, you can certainly find it. But what NMW paraphrased is not a giddy, overconfident bubble of positivity LOL. It’s what every fan base says when their team is on a 10-win roll.