He basically said the refs can't do their jobs properly and need to be made accountable for their mistakes. He was anything but subtle about it though.
He also had a bash at the interviewer saying they (the media) try to catch managers out in interviews by making them speak right after the game and trying to get a heated response out of them... which Nige didn't seem to realise is exactly what he was doing at the time.
Interestingly his opposite number seemed to agree that it wasn't a penalty but for me the player's gone through the man to take the ball.