NAU lost to Montana in large because of a targeting call against their starting QB who is an all American I believe. If you look at the video too, it’s not really blatant or intentional. It was bogus imo, especially on such an important player. A perfect example of how refs ruin the game.
When the QB went out, NAU’s offense became non-existent. Meanwhile Montana was on their 4th string QB, who happened to be their 1st string TE.