The first part comes from the media, which in Colorado has never been biased toward CU over CSU, and if the players come out flat and play ****ty because fans aren't taking the opponent seriously, then that's 100% on the coaches for not having them prepared and focused.Depends in how much stock you put into players "reading their press clippings".
Taking them seriously also helps temper the three mile island type meltdown should CU somehow lose.
As to your second statement, the CU fan meltdown happens when CU loses, regardless of opponent.