It is said that Pius XII was by no means a staunch traditionalist.
His reforms, omissions and failures paved the way for Vatican II. Just a few things that Pius XII did are:
He promoted Annibale Bugnini, the author of the New Mass, and began the liturgical reform with his allowance of reforms in the Holy Week Rites. A good number of liturgical scholars think that the reforms of Holy Week were terrible.
One example is the allowance of distribution of Holy Communion on Good Friday. The decree of the Holy Office under Pope Pius X On Frequent Communion cites Pope Innocent XI who condemned such a practice.
· He promoted men like Giovanni Montini (later Paul VI) and Angelo Roncalli (later John XXIII), without which promotions these men could never have had the influence or caused the immeasurable destruction that they did.
· He said that theistic evolution could be taught in Catholic schools (Humani Generis, 1950), which is nothing short of ludicrous – and arguably heretical.
· He taught that birth control could be used by couples by means of the rhythm method (or Natural Family Planning), which is a frustration and a subordination of the primary purpose of the marriage act – conception.
· He allowed the persecution and subsequent excommunication of Father Leonard Feeney, whether through willful complicity or neglect, for doing what every Catholic priest should do: preach the Gospel, defend the faith and adhere to defined dogma.
This last offense was the most serious. With the persecution of Father Feeney, the “authorities” in Boston and Rome not only did not aid Father Feeney in his quest to convert non-Catholics, but actually stopped him! Think about that: The men who were supposed to foster the salvation of souls and conversion to the true Faith actually made it as difficult as possible for Father Feeney to do so.
They made his task of delivering Christ’s saving message – that salvation only comes from membership in the Church He established – as hard as they could, while giving millions of non-Catholics the false impression that they were okay in the state of damnation in which they existed.
Richard Cushing, the apostate Archbishop of Boston, who first silenced Father Feeney – not over baptism of desire, but over extra ecclesiam nulla salus (outside the Church there is no salvation) – boasted before his death that he had not made a convert in his whole life.