I think there must be a distiction between “traditionalist” catholics and the catholics mentioned in this discussion.
There is for example an order called the Priestly Fraternity of St. Peter who celebrate a latin mass and are still in line with the Pope. These priests should not be confused with the priests who have elected thier own pope.
This order has been granted permission from the Pope and acknowledge him as our true pope.
I wouldn’t tag Mel Gibson’s name to the order that has broken from the church. As far as I know, he is involved with the order that celebrates the latin mass and is obediant to Pope John Paul.
For more info on the Priestly Fraternity of St. Peter visit http://www.unavoce.org