First, remember that religious liberty was condemned by Leo XIII, Pius VI, Pius IX. Second, here is the teaching of the Church on religious unity. I encourage you to read these encyclicals of Pius IX and Pius XI.
THE SYLLABUS OF ERRORS CONDEMNED BY PIUS IX
18. Protestantism is nothing more than another form of the same true Christian religion, in which form it is given to please God equally as in the Catholic Church. – Encyclical “Noscitis,” Dec. 8, 1849.
They’re prayers are not equal to the Church’s.
MORTALIUM ANIMOS
ON RELIGIOUS UNITY
ENCYCLICAL OF POPE PIUS XI JANUARY 6, 1928
“For which reason conventions, meetings and addresses are frequently arranged by these persons, at which a large number of listeners are present, and at which all without distinction are invited to join in the discussion, both infidels of every kind, and Christians, even those who have unhappily fallen away from Christ or who with obstinacy and pertinacity deny His divine nature and mission. Certainly such attempts can nowise be approved by Catholics, founded as they are on that false opinion which considers all religions to be more or less good and praiseworthy, since they all in different ways manifest and signify that sense which is inborn in us all, and by which we are led to God and to the obedient acknowledgment of His rule. Not only are those who hold this opinion in error and deceived, but also in distorting the idea of true religion they reject it, and little by little turn aside to naturalism and atheism, as it is called; from which it clearly follows that one who supports those who hold these theories and attempt to realize them, is altogether abandoning the divinely revealed religion.”
“But some are more easily deceived by the outward appearance of good when there is question of fostering unity among all Christians.”
“All Christians, they add, should be as “one”: for then they would be much more powerful in driving out the pest of irreligion…This undertaking is so actively promoted as in many places to win for itself the adhesion of a number of citizens, and it even takes possession of the minds of very many Catholics and allures them with the hope of bringing about such a union as would be agreeable to the desires of Holy Mother Church, who has indeed nothing more at heart than to recall her erring sons and to lead them back to her bosom. But in reality beneath these enticing words and blandishments lies hid a most grave error, by which the foundations of the Catholic faith are completely destroyed.”
Let all Catholics pray today in reparation for the blasphemy done to our Lady, and to pray for true Christian unity in which all convert to the true faith and the only true path to salvation! Our Lady Help of Christians, Pray for us!!