The liberal bishops who failed to follow the discipline of the Church at the time. They also were the ones who misinterpreted Vatican II, got rid of the Latin Mass, agitated for priests to marry, and otherwise tried to protestantize the church. All those abuses were based in the sin of disobedience - to scripture and to the authority of the Church.
Not a good idea, and the Church has paid dearly for it. But Benedict XVI is working hard to undo the damage and prevent a recurrence.
So only liberal priests in the Catholic Church were the ones who failed to follow Romans 13:1?